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Working with the PTMC outreach team gives Dennis a sense of purpose. He likes giving back in any capacity he can, especially now that he’s doing better himself, and Dr. Abbott is wicked smart and always good for a conversation when they pull shifts together.
But Dennis’ absolute favorite part of the job is listening. It isn't always happy stories –there is a reason most of these people are relying on street medicine and outreach programs, after all– but he still manages to collect a few bright spots. He gets to hear fond memories, look at coffee-stained photographs of lost relatives, and even jot down the occasional long-forgotten family recipe.
Dennis cherishes them all the same.
The outreach program isn’t just about walking the pavement, either. While the street work is what caught Dennis's attention first, they also manage cyclical care for low-income patients who require regular, at-home medical follow-ups.
Because he is human, Dennis has his favorites. He knows he shouldn’t, but he can’t help it. His top three include a single mother raising a daughter who requires intravenous feeding and round-the-clock care. The mother is always so genuinely thrilled to receive the nutritional supplies Dennis brings, constantly offering him glasses of water and little crocheted trinkets that he gladly accepts while he checks her daughter's vitals. Then there is an elderly couple who love to talk his ear off about their children. Dennis always leaves their cramped apartment feeling like shit; he feels profound sympathy for the couple, burning anger at their absentee kids, and a heavy dose of hypocrisy because he hasn’t checked in on his own parents in over three years. It’s a complicated mess of emotions, but he loves the couple anyway.
And then, there is Greg.
Greg is an entirely different kind of story. Dr. Abbott had filled Dennis in on the man’s grim arrival at PTMC. Greg had been found under a bridge just three minutes from the hospital, his right leg severely mutilated –essentially chopped off. When the remaining tissue and bone fragments were sent to pathology, they found profound, necrotic scarring indicative of massive muscle death and a history of chronic, agonizing pain spanning decades. Abbott and Dr. Ellis had rushed him into the ER, cleaned the margins, closed the stump, and immediately thrown him into forced detox.
According to Abbott, they got Greg through the worst of the withdrawals and started him on a strict, non-narcotic cocktail for neuropathy, phantom limb pain, and long-term surgical complications. They can't officially assess his psychological status because Greg outright refuses psychiatric evaluations. "I can smell a shrink from a mile away," he'd sneered. The only compromise they've reached is that Greg agrees to stay off the opioids, and he takes his prescribed meds regularly.
When Dennis visits the older man for his weekly medication drop-offs and monthly check-ups, they talk. Or rather, Greg talks, and Dennis listens.
Greg lives in a claustrophobic, one-room studio. There is a small living area, a bathroom, and absolutely nothing else. No pictures on the walls. No books on the shelves. No music. The only source of light and noise is usually the television, which Greg spends his days staring at from his old looking chair.
Despite the bleak surroundings, Greg likes to talk. He talks about James the most.
From what Dennis has been able to piece together, James was Greg’s husband. They met at a medical conference many decades ago –though Greg is always incredibly vague about what kind of work he actually did, Dennis knows that James was the ‘best oncologist, better friend’– and had been together ever since. Greg, now in his mid-sixties with deep-set lines of grief etched into his face, talks about them eating lunch together at their workplace. He talks about the ridiculous, elaborate pranks they used to pull on each other. He talks about how James was the only thing keeping him sane, the only person on earth he would actually listen to. Now that James is gone, taken by cancer, Greg claims he doesn’t have anyone left to keep him in check.
But he tells Dennis all of this with a dry, bitter cynicism. He weaponizes his words, masking his grief behind layers of biting wit and misanthropy. If Dennis weren't so good at reading between the lines, he would miss the profound, devastating longing in the older man's voice. Greg talks about the shenanigans and the love, expertly steering clear of the agony of watching his best friend die, but Dennis hears the phantom pain in Greg's voice just as clearly as the phantom pain in his missing leg.
Dennis feels for the man. So, he lingers a little longer in the depressing studio, letting the television drone on in the background, trying to keep Greg company for as long as he can.
Over the next six months, their routine deepens. Dennis goes from just managing Greg’s medications to bringing him groceries and decent takeout, trading jokes over lukewarm noodles in the dim light of the studio. They talk, and more importantly, they argue. Greg actually seems to enjoy hearing about the hospital, his sharp mind dissecting the mundane hospital gossip Dennis brings him hungrily. When Dennis finally tells him that he matched for his residency at the PTMC ER, Greg doesn't mock him. Instead, he offers a surprisingly genuine, "I'm proud of you, kid."
Dennis doesn’t fully understand why, but the rare compliment settles warmly in his chest.
But today, Dennis is working the floor when the doors to the ambulance bay bang open. He spots a very familiar, very grumpy face being wheeled toward Bay 13.
"Greg!" Dennis calls out, abandoning his charting to follow Mateo as he wheels the stretcher in. "What happened?" he asks, looking between the patient and Javadi.
"He was found unresponsive in his apartment by–" Javadi starts, but a loud, irritated groan cuts her off.
"That damn crutch broke," Greg snaps angrily, violently swatting Mateo’s hands away as the nurse tries to help him transition from the stretcher to the hospital bed. "Wood rot. Cheap piece of crap."
Dennis sighs, stepping in to help Mateo guide the older man down. Greg complains through gritted teeth but finally sags back against the mattress, his face pale and sporting a nasty, bleeding gash near his hairline.
"I’ll take care of Greg, Javadi," Dennis says smoothly, holding out his hand for the tablet.
"You sure?" Javadi asks, eyeing Greg with deep suspicion and a hint of lingering hostility.
"Yes, he is sure," Greg answers for him, his voice dripping with condescension. "Dennis is my primary. He actually knows how to read my chart. I don’t want one of you ER imbeciles mixing up my nerve meds just because some overworked intern is sniffing Adderall to get through a double shift."
Javadi blinks slowly at Greg, her jaw tight, before she wordlessly slaps the tablet into Dennis’ hand and marches out of the bay. Dennis can only imagine the colorful insults Greg hurled at her to make her leave that fast.
"Women," Greg mutters, looking at Mateo with a smug smirk. "So sentimental."
"Greg," Dennis says, a warning in his tone. He shoots Mateo an apologetic look. "I’ve got him, Mateo. Thank you."
"Good luck," Mateo mutters softly, making a quick escape.
As soon as the curtain slides shut, sealing them in, Greg lets out a heavy breath.
"Alone at last," Greg teases dryly. He reaches up to touch his head and winces. "My brain is trying to claw its way out of my skull."
"I bet," Dennis says, snapping on a pair of blue nitrile gloves and moving to the supply cart to gather sterile gauze, saline, and a neuro penlight. "I told you that you needed a new crutch months ago. I even offered to bring you an aluminum one."
"I know," Greg relents, sounding exhausted as Dennis clicks the penlight on and checks his pupillary response. "But I don't leave the house. I only need it to get from the bed to the bathroom. Aluminum clicks too loudly. It's annoying."
Dennis nods, satisfied that Greg's pupils are equal and reactive. He starts cleaning the dried blood from Greg’s forehead to assess the damage. "I know, I get it, Greg. But a fall is a fall, and a concussion is a concussion." He inspects the jagged two-inch laceration. "I’m going to use Dermabond on this. No stitches."
"Why? Worried about my modeling career?" Greg deadpans.
"I just don't want to mess up your pretty face," Dennis jokes back, tearing open the small purple vial of adhesive.
"You're too good to me, Saint Dennis," Greg smirks, his eyes tracking Dennis's hands as he works with practiced efficiency. The pain meds they pushed in the ambulance must be kicking in, because the tight pinch between Greg's eyebrows is softening. "So, how is the week treating you, Dr. Whitaker? Any morons swallow anything shiny?"
Dennis smiles behind his mask as he pinches the edges of the cut together and applies the glue. "Well enough. Do you want to hear about the teenage twins that came in yesterday? Both presenting with severe abdominal cramping, vomiting, and tachycardia, but only one of them actually had a physiological diagnosis."
Greg’s eyes instantly sharpen. The boredom vanishes. "Monozygotic twins? Folie à deux?"
"Close," Dennis says, enjoying the way Greg's mind instantly clicks into gear. "Somatic symptom disorder. Twin A had a ruptured ovarian cyst. Twin B was so psychologically enmeshed with her sister that her brain literally manufactured the exact same symptoms. We had to separate them into different wards just to get Twin B's heart rate down."
"Boring," Greg declares, though there's a distinct gleam of approval in his eyes. "Psychological mimicry is just the brain being dramatic. You should have told them they both had parasites. Missed opportunity for a psych-eval masquerading as an exorcism."
Before Dennis can laugh, the heavy squeak of a gurney wheels past their curtain.
Bay 12, right next door.
Dennis hears the chaotic scuffle of feet. Through the thin fabric dividing the bays, he hears Trinity's sharp, commanding voice, followed by Robby’s.
"Elena Vega, forty-four," a paramedic rattles off. "Presents with acute, generalized abdominal pain. Temp is 102.4, hypotensive at 88 over 55. She’s tachycardic and delirious, drifting between fragmented Spanish and English."
As Trinity begins a rapid-fire physical exam, loudly palpating the woman's abdomen and noting guarding and rebound tenderness, Dennis pauses. He realizes he is listening with one ear.
He glances down.
Greg is frozen. The older man's eyes are locked onto the thin blue curtain separating them from Bay 12. He isn't complaining about his head anymore. He isn't making sarcastic remarks about Dennis's glue job. His entire posture has shifted from exhausted resignation to sharp, predatory focus.
“All good, Greg?” Dennis asks, peeling off his purple gloves and tossing them into the biohazard bin as Dr. Robinavitch steps through the curtain into Bay 13.
Greg blinks, breaking his trance. He looks at Robby in all his authoritative glory, then turns back to Dennis. The intense focus vanishes, instantly replaced by a tight, exaggerated grimace of pain. “You know what, Dr. Whitaker? On second thought, my head is still absolutely pounding.”
Dennis frowns, his medical instincts instantly overriding his confusion. He steps closer, gently palpating the area around the glued laceration again. “Do you feel dizzy? Nauseous?”
“If you’re about to ask about a subdural hematoma, save your breath,” Greg says, waving a hand dismissively. “I’m not having a lucid interval. Or an interval of any kind, really. My sober life is just one long, uninterrupted stretch of tedious consciousness. I’m just aching because my skull took a dive straight into a hardwood floorboard.”
Dennis keeps his fingers moving carefully over Greg’s scalp, trying to find any secondary bumps he might have missed. He doesn't even question Greg's accurate use of medical terminology anymore. “Okay, Greg,” Dennis says softly, satisfied that there's no skull depression. “I’ll put you on concussion watch just to be safe.”
“Will you come hold my hand and check my pupils every hour?” Greg asks, his tone mocking but his eyes darting back toward the curtain separating him from the mysterious patient next door.
Before Dennis can answer, Robby pipes up.
“Or one of our very capable nurses will,” he says with a polite, practiced smile. He steps forward, giving Dennis’ shoulder a firm squeeze and subtly pulling him a step back from the bed. “I need to speak with my resident for just a moment, Mr. Wilson.”
Wilson. Dennis feels a familiar pang of sympathy in his chest. He knows from their talks that Greg took James' last name, clinging to it like a shield after his husband passed away.
Greg watches them with narrowed, calculating eyes but doesn't say a word.
Robby leads Dennis just outside the bay, letting the curtain fall mostly shut behind them. “Do you know that man, Whitaker?” Robby asks, keeping his voice low over the ambient hum of the ER.
Dennis nods. “Yes, Greg is one of my regulars on my rounds with the outreach team. I see him every week,” he explains. “I know his entire medical history and his current medication cocktail, so it’s just safer and easier if I take care of him while he's here.”
“Alright. I’ll look over his chart just in case, but you can stay on as his primary,” Robby tells him. The older doctor trails off, peering through the slight gap in the curtain at Greg. His brow furrows in deep thought.
“Everything okay?” Dennis asks, tilting his head.
“Yeah, yeah,” Robby murmurs, rubbing the back of his neck. “I’m just... trying to remember something. He looks incredibly familiar. Have we treated him before?”
Dennis smirks, unable to resist the opening. “Is your age finally catching up to you, Chief?” he teases. Robby is in his mid-fifties, but he takes the ribbing well.
Robby snorts, reaching out to roughly ruffle Dennis’ hair like an overgrown kid. “Careful, Whitaker. See you on the floor,” he shoots back, though the warning sounds entirely fond as he walks away toward the nurses' station.
Dennis laughs under his breath, smoothing his hair back down. He picks up Greg’s chart from the rolling cart, preparing to go back into Bay 13 to officially explain the one-hour concussion protocol.
He pulls the curtain back –and freezes.
Greg is half-out of his bed. The older man has his chest draped precariously over the metal bed railing, his one good leg planted firmly on the floor for balance. He is holding his IV pole like a shepherd's crook, using the metal hook at the top to subtly pull back the edge of the curtain dividing Bay 13 from Bay 12, shamelessly spying on Trinity as she works on the delirious woman next door.
“Greg!” Dennis hisses, keeping his voice low but urgent as he rushes forward. He wrestles the IV pole out of the man’s grip and places his hands firmly on Greg’s shoulders, pushing him back. “What are you doing? Get back in bed!”
“What do you think she has?” Greg asks, his voice dropping to a low, conspiratorial whisper as Dennis forcefully yanks the blue curtain shut, sealing them off from Bay 12.
“I’m not her doctor, Greg. I'm yours,” Dennis tells him firmly, adjusting the thin hospital blanket over Greg’s leg.
“I thought everyone belonged to everyone in the ER. A big, happy, disease-sharing commune,” Greg jokes, though his eyes are still darting toward the fabric divider as if he can see through it with sheer force of will.
Dennis snorts, planting his hands on his hips and staring hard at the older man.
“C’mon, talk to me,” Greg wheedles, settling back against the pillows with a faux-innocent, entirely unconvincing smile. “You need to assess my concussion anyway. Keep my brain engaged. It's standard medical protocol to keep the patient talking.”
Dennis sighs, but he can't help a small, fond smile as he pulls his penlight back out of his breast pocket. He tries to recall the rapid-fire vitals Trinity had shouted out next door. “Dr. Santos will probably look for ruptured diverticulitis or maybe ascending cholangitis. Given the hypotension and abdominal pain, she’ll definitely ask for a FAST scan to check for free fluid before she does anything invasive.”
Greg groans loudly, his head rolling back against the pillow in exaggerated agony. “Boring. It’s absolutely not diverticulitis. Did you even look at her when she rolled past?”
There it is again.
That feeling –that quiet, nagging suspicion– creeps up the back of Dennis’ neck. It happens more and more these days. Especially when Dennis talks about his shifts, Greg lets slip these little tidbits, these hyper-specific, razor-sharp observations that lead Dennis to believe the man wasn't just married to a doctor. He was a doctor himself. Probably before the horrifying ordeal under the bridge with his amputated leg. Dennis can’t even imagine the devastation of having to stop practicing medicine because of a severe physical trauma and subsequent addiction.
“You can't diagnose a patient through a curtain, Greg,” Dennis tells him gently, trying to ground the man back in reality.
“I've diagnosed with far less,” Greg fires back, sounding fiercely proud, the shadow of a former arrogance flaring to life. “Listen to me. Her skin. It wasn't just flushed from the fever. It had a sheen to it. Diaphoretic, sure, but… greasy. Waxy. Check her neck.”
Dennis sighs, shaking his head and stepping closer to the bed. “I'm checking your head, not her neck. Look at my nose.”
Dennis holds up his index finger, moving it slowly in a deliberate H-pattern, carefully watching Greg's eyes track the movement. “Follow my finger without moving your head. Good. No nystagmus.” He holds out his hands. “Squeeze my fingers as hard as you can.”
Greg grips them with surprising, bruising strength.
“Alright, motor function is equal bilaterally,” Dennis notes, pulling his hands back. “Who is the president?”
“An idiot,” Greg deadpans without missing a beat.
“Year?”
“Two thousand twenty-five,” Greg answers, rolling his eyes. “And you're a resident who is actively ignoring a fascinating medical mystery to ask an old crippled man what day it is.”
Dennis ignores the bait, checking Greg's reflexes and ensuring his speech remains sharp and completely unslurred. “Your Glasgow score is a perfect fifteen. You’re fine for now, but I’m officially putting you on concussion watch. I’ll be back in exactly one hour, Greg. Please behave.”
“Yes, yes. I’ll be an absolute angel,” Greg lies smoothly, his blue eyes already drifting back toward the curtain.
Dennis knows he is lying. He knows it with absolute certainty. But the ER is overflowing and he has a dozen other patients to see. With one last warning glare that Greg completely ignores, Dennis steps out of the bay.
He finds Trin at the nurses’ cart station close to the Bays forty minutes and one chaotic STEMI later.
"Hey," he calls out, leaning against the high counter.
Trinity doesn't look away from the glowing telemetry monitors. "Sup, Huckleberry?" she answers, her voice dry and laced with the specific, bone-deep exhaustion of a resident.
"You’re the primary on Bay 12, right?" Dennis starts, trying for breezy and casual.
Trinity stops clicking her pen and squints at the dry-erase board she is copying to her charts. "Yeah. Acute abdominal pain, fever, hypotensive. Probably a ruptured diverticulum or a really pissed-off gallbladder. Why?"
"Did you..." He pauses, groaning internally at how stupid this is going to sound without the context of a hidden genius next door. "Did you check her neck?"
Trinity turns to him slowly, her expression deadpan. "Why on earth would I check her neck for lower abdominal pain, Dennis?"
It is a completely valid question that Dennis has absolutely no clinical answer to. "Meningitis?" he offers lamely.
Trinity stares at him like he has suddenly grown a second head. And to be fair, he feels like he has.
"She has a fever of a hundred and two and she's delirious," he scrambles to justify, though even to his own ears, the differential sounds pathetic.
"She has no nuchal rigidity and no photophobia," Trinity fires back, her sarcasm biting right through her fatigue. "You can check her neck yourself if you want. Hell, order a lumbar puncture and an MRI for my patient while you're at it. What do I care? It's not like I have six other people trying to die on me."
"Sorry," Dennis says immediately, holding up his hands in surrender. "I was just curious. Pretend I didn’t say anything."
Trinity stares at him for a long moment, the irritation softening into genuine confusion. She sighs, rubbing her temples. "It’s fine. You can actually examine her if you want, I don’t mind. But I’m curious too, Huckleberry. Why the neck?"
Dennis blinks. "Her skin was waxy."
Trinity nods slowly, her brow furrowing. Knowing his best friend, she absolutely doesn’t want to admit she doesn’t know what he is talking about or how that correlates to an acute abdomen. But Dennis doesn’t know either, so they are both sailing blindly in the same boat.
He stops at Bay 12 just before Greg’s scheduled hourly check. The woman, Elena, is staring blankly at the wall, her breathing shallow and rapid. She is almost non-responsive, drifting in a delirious haze, but Dennis can’t tell if it’s a primary neurological symptom or just the systemic toll of the fever and hypotension.
"Hey, Elena? I’m Dr. Whitaker. I just need to check something real quick," he tells her gently.
The woman blinks, her glassy eyes rolling toward him, and she gives a slow, barely perceptible nod after a long beat.
Dennis steps closer, snapping on a pair of gloves. He observes her closely. Greg was right; her skin isn't just diaphoretic from the fever. It's coated in a strange, greasy sheen. He gently places his fingers against her neck. Her carotid pulse is bounding, hammering against his fingertips like a trapped bird in sympathetic overdrive, but there's no goiter, no jugular venous distention.
He moves his hands down to her abdomen. "I'm just going to press here, okay?"
When he attempts to palpate her right upper quadrant, just below the ribcage, Elena gasps. Even in her profound delirium, her body reacts violently. She subtly flinches, but instead of just curling inward to protect her stomach, she sharply pulls her right shoulder up toward her ear, bracing against the touch.
Dennis frowns, his mind cataloging the strange reflex, before quietly excusing himself and stepping through the shared curtain from Bay 12 to Bay 13.
Greg is already staring at him. The older man looks incredibly smug, leaning back against his pillows like a king holding court. He clearly heard every single word of Dennis's awkward interrogation at the nurses' station cart, and the subsequent physical exam.
"Meningitis?" Greg drawls, the word dripping with pure, concentrated condescension. "Really? Did they teach you that at the Mickey Mouse School of Medicine? A greasy sheen and your mind jumps straight to the meninges. I'm embarrassed for you."
Dennis sighs, grabbing Greg’s chart to start his concussion protocol, trying desperately to ignore the flush of heat rising in his own cheeks. "I didn't have a lot of time to prep a proper differential, Greg."
"You didn't have a brain to prep a differential," Greg corrects smoothly. "So? What did you find when you inevitably poked her?"
Dennis hesitates, but the medical mystery is itching at the back of his mind too. "Bounding pulse. And when I palpated the RUQ, she guarded. But she pulled her right shoulder up. Kehr's sign?"
"Bravo. You remembered a first-year buzzword," Greg mocks, though his blue eyes are sharp, rapidly calculating the data. "But it’s not her gut. The pain is above it. The right shoulder is referred pain, carried straight up the phrenic nerve."
Greg leans forward, his voice dropping into that intense, magnetic cadence that makes Dennis want to hang onto every word. "Kehr’s sign isn’t just for a ruptured spleen on the left; it’s a distress flare for any diaphragmatic irritation. Something up high is leaking and pissing off her diaphragm. It’s not a colon perforation. Think higher, Denny."
Dennis sighs again, clicking his penlight on and shining the bright beam into Greg's eyes, though he is almost certain the older man is perfectly fine.
"Think higher," Dennis repeats softly to himself, his mind racing through the anatomy resting just beneath the diaphragm. The liver, the stomach, the spleen... the adrenal glands. "I’ll ask Trinity to let me see her labs and imaging," Dennis tells him, clicking the light off. "What exactly are we looking for?"
Greg twists his mouth, his brow furrowing in deep thought as he stares at the ceiling. "It’s a perforated subphrenic abscess. The pocket of infection is sitting right up against her diaphragm, irritating the phrenic nerve. It was probably too small or awkwardly positioned, so it got missed on the initial FAST scan. She needs a surgical consult, not a gastroenterologist."
Dennis nods slowly, filing the differential away. "I’ll talk to Trinity," he promises. He looks around the cramped space of Bay 13, listening to the chaotic, never-ending symphony of monitors and sirens outside the curtain. "But I’m going to have to move you out of here. We always need the acute bays open for incoming traumas."
Dennis pauses, a slow, wicked smile spreading across his face as an idea strikes him. He looks down at Greg, trying to look as evil as he possibly can. "How do you feel about the chairs?"
Greg frowns, genuinely confused for a fraction of a second, before his eyes snap wide open. He realizes exactly what Dennis is talking about: the fast-track triage area. The clinic. The purgatory of the ER, filled with runny noses, minor scrapes, and hypochondriacs.
"You wouldn’t dare," Greg breathes, though there is a sudden, undeniable spark of electricity in his gaze.
Dennis smiles even bigger. "I’ll get you our nicest wheelchair. And I’ll even find you a spare white coat. Maybe you can use that brilliant mind of yours to actually work while you wait out your concussion."
Thirty minutes later, the ER is still a small battle zone, and Dennis is sprinting between a dislocated shoulder and a suspected appendicitis. But every time his route takes him past the open triage area, he has to do a double-take.
He had parked Greg in a corner of the fast-track waiting room, draped a slightly too-large, nameless white coat over the man's shoulders, and then made his case to a very amused Dr. McKay, who had just crossed her arms, taken one look at the grumpy, crippled man in the wheelchair, and shrugged. She has a soft spot for strays, and an even softer spot for anyone willing to cut through bureaucratic red tape.
Whenever Dennis manages to glance over, Greg is the centre of attention in some way. He is an absolute machine.
During Dennis's first fly-by, Greg is aggressively palpating a young tennis player's arm.
"It's not tennis elbow, you idiot, you don't even play with a proper backhand," Greg is snapping, ignoring the patient's offended gasp. "The pain is radiating down to your thumb and index finger. You have a diminished brachioradialis reflex." Greg gestures vaguely toward McKay, who is watching from the charting station with a mixture of amusement and disbelief. "Tell the saintly Doctor McKay to order an MRI of your cervical spine. You have a C6 radiculopathy. Stop playing tennis and start doing neck stretches."
Ten minutes later, Dennis jogs past with a stack of discharge papers and sees a woman hyperventilating into a paper bag, her husband hovering anxiously.
"It's just a panic attack, she gets them all the time," the husband is saying.
"Shut up," Greg barks from his wheelchair, rolling himself closer. He doesn't offer comfort; he grabs the woman's wrist, his long fingers pressing expertly against her radial artery. He stares at the wall for five seconds, his eyes tracking an invisible rhythm. "Her heart rate is irregularly irregular. It's paroxysmal atrial fibrillation. The 'panic attack' is her heart suddenly beating at a hundred and sixty beats per minute and failing to pump oxygenated blood to her brain."
Greg points a commanding finger at a passing nurse, poor Mateo. "Get an EKG, push twenty milligrams of diltiazem, and admit her to telemetry. Next!"
McKay just shakes her head with a soft amused smile, furiously inputting the orders on her tablet, completely willing to let the bizarre, phantom-doctor do the heavy lifting.
By the time Dennis finally gets a breather to do Greg's official one-hour concussion check, he finds the older man staring down a miserable-looking guy with a box of tissues.
"You have a virus," Greg is saying, his voice completely devoid of empathy. "Your body will either figure it out, or it won’t, and you will die. But antibiotics won't help you, and my time is precious. Go home, drink soup, and stop breathing on me. Next."
Dennis steps in, unable to hide his grin. "Having fun, Dr. Wilson?"
"I am surrounded by morons and people who don't know how to wash their hands," Greg complains, though the color in his cheeks is higher, and the dull, grieving emptiness in his eyes is entirely gone. "Check my pupils so I can get back to saving humanity from its own stupidity."
Dennis pulls out his penlight, checking Greg's eyes and reflexes. "Everything looks perfect. Though, speaking of antibiotics..." Dennis pulls his phone out of his pocket with his free hand. "Did you see the new study published in the New England Journal? They're testing a new bacteriophage therapy against multidrug-resistant Acinetobacter baumannii."
Greg freezes mid-complaint. The caustic clinic doctor vanishes, replaced instantly by the ravenous academic. "Show me."
Dennis hands over the phone. For the next ten minutes, they don't move. Greg devours the abstract, his eyes darting back and forth across the screen as Dennis takes the moment to update his charts.
"Their sample size is pathetic," Greg fires off, handing the phone back. "Thirty patients? And they didn't control for concomitant immunosuppressive therapy. If a patient is already on high-dose corticosteroids, the phage efficacy drops. Why?"
"Because the steroids suppress the innate immune response," Dennis answers instantly, his heart beating a little faster as he tries to keep up. "The phages lyse the bacteria, but you still need the macrophages to clear the debris. Without them, you risk secondary endotoxic shock."
"Exactly," Greg says, his blue eyes locking onto Dennis with intense, terrifying approval. "So how would you alter the trial parameters?"
"I'd stratify the cohorts based on their baseline CRP and procalcitonin levels, and exclude anyone on daily prednisone," Dennis replies, feeling a rush of adrenaline that has nothing to do with the ER chaos.
Greg nods slowly, a genuine, albeit tiny, smile touching the corners of his mouth. "Not bad, Dennis. Not bad at all."
Standing there in the middle of the crowded, noisy triage center, watching this battered, amputee outreach patient dissect a top-tier medical journal with effortless brilliance, it hits Dennis like a physical blow. He isn't just bantering with a smart guy. He is being taught. He is being challenged and mentored by an absolute master of the craft.
"Now," Greg says, clapping his hands together and breaking the spell. "Go find your little resident friend and steal Elena Vega's labs. The suspense is killing me, and unlike these patients, I actually want to live to see tomorrow."
"Surgery says no. Her abdomen is completely soft. No guarding, no rigidity," Dennis tells him, wheeling Greg smoothly through the chaotic corridors of the ER. He navigates around a gurney and a crash cart while Greg casually chews on a turkey sandwich and noisily slurps from a child-sized apple juice box Dennis had snagged from the pediatric stash. "They think it’s biliary colic, but her bilirubin is dead normal."
"Then it’s not the gallbladder. It’s the duct," Greg states with absolute authority, pausing between a bite and a slurp. "A gallstone passed, scratched up the plumbing on its way out, and now the infection is pooling in the liver. It’s ascending cholangitis without the jaundice." Greg cranes his neck back over his shoulder to look at Dennis upside down. "Her pressure’s still crap?"
Dennis sighs, turning the wheelchair past the trauma bays. "It’s actually improving with a rapid bolus of IV fluids."
Greg makes a dismissive, clicking noise in the back of his throat. He goes perfectly still, the juice box hovering inches from his mouth. "It shouldn’t be. If it’s infectious cholangitis causing that kind of hypotensive shock, saline fluids wouldn’t cut it. She’d need pressors and an immediate ERCP to clear the infected duct. Unless..."
He stops speaking. He stares at a blank spot on the linoleum floor. If Dennis concentrates, he can practically hear the gears inside the older man's head grinding and locking into a new configuration.
"...Unless it’s not an infection at all," Greg murmurs, his eyes narrowing in fierce concentration. "It’s an inflammation. A massive, systemic response. What’s her calcium?"
Dennis parks the wheelchair near the main nurses' station. Where Dana is standing behind the counter, she stares at the bizarre sight of one of their residents pushing a battered, homeless amputee around like a VIP, but thankfully she is far too busy to actually say anything.
Dennis pulls his hospital tablet, quickly tapping his way into Elena Vega’s chart and bringing up her Comprehensive Metabolic Panel. His eyebrows shoot up. "It’s... 12.8 mg/dL. That's severely hypercalcemic. How did you know?"
Greg shrugs, tossing the empty juice box perfectly into a nearby biohazard bin. "Didn’t. I was hoping for sarcoidosis, but that calcium is way too high for a standard granuloma. It’s not an infection, Denny. It’s a systemic inflammatory cascade from something else. It’s a wolf in sheep’s clothing. Her body is screaming, and the high calcium is causing her organs to attack themselves."
Greg drums his long fingers against the armrest of the wheelchair. "Hypercalcemia triggers pancreatic auto-digestion. We need a lipase level to confirm pancreatitis."
"And who exactly are you?" a voice demands.
Dennis and Greg both turn. Trinity is standing right behind them, a stack of physical charts clutched to her chest, her eyes narrowed into a fierce, exhausted glare.
"Trin, hey," Dennis starts, stepping slightly in front of the wheelchair in a subconscious protective gesture. "This is Dr. Wilson."
Greg gives a lazy, two-finger wave. Though it isn't a ‘nice to meet you’ gesture, more of a ‘whatever, pay attention to my brilliance’ dismissal.
"He is on concussion watch," Dennis explains quickly, trying to defuse the situation. Behind the desk, Dana stops typing. She is now leaning against the counter, looking deeply amused by the impending trainwreck.
"Oh, well, isn't that just fun," Trinity deadpans, her voice practically dripping with sarcasm. "A retired doctor with traumatic brain injury playing around with my patient's charts."
"I’m trying to save your patient's life, you glorified med student," Greg complains loudly, leaning forward in the chair. "Have a little more respect for your elders. I’m a cripple, for fuck's sake. The least you could do is humor me."
"Shut up, Greg," Dennis mutters under his breath, rubbing the bridge of his nose.
Trinity doesn't even blink at the insult. She just shifts the heavy stack of charts to her other arm and stares Greg down with the unimpressed fortitude of a woman who has been awake for too many hours.
"Okay, Oh Retired One," Trinity starts, her tone dangerously flat. Dennis groans. This is not going to end well. "Why exactly," Trinity continues, ignoring Dennis entirely, "do you want to run a lipase on my patient?"
“Where the hell did you all come from, the funhouse?” Greg asks acidly, throwing his hands up in mock despair.
Behind the high counter, Dana lets out a sharp, sudden snort of laughter.
Greg’s head whips around to look at the charge nurse. He points a long, triumphant finger at her, then turns back to Trinity. “See? Even she would be able to answer that.”
Dennis groans, his shoulders dropping. “Greg, please don’t drag Dana into this.”
But Dana, never one to back down from ER entertainment, happily humors him. She doesn't even look up from her computer screen as she types. “He wants to rule out acute pancreatitis, Dr. Santos. The hypercalcemia is causing a systemic inflammatory response, which triggers the pancreas to start auto-digesting.”
Greg gasps, slapping a hand over his heart in an exaggerated, flabbergasted expression. “Good Lord,” he breathes, looking at Trinity with wide, mocking eyes. “The nurses are smarter than you. And they actually pay attention to the metabolic panels!”
Dennis immediately slaps a hand over his mouth, desperately trying to hide his face. He isn’t laughing at his best friend –he swears he isn't! He knows exactly how exhausting a second-year residency is. But Greg is just so shamelessly theatrical, playing the room like a maestro, and it is undeniably, painfully funny.
“You really need to tell me the name of your medical school,” Greg continues, his voice dripping with faux concern, “so I can send them a very strongly worded letter demanding a refund on your behalf.”
“An email is better,” Dana pipes up brightly, grabbing a stack of papers and standing up. “They don’t read letters anymore. I know we certainly don’t.” And with that devastatingly casual drop of the mic, she walks away down the corridor.
Greg smirks, turning his piercing blue eyes back to a seething Trinity. “Just run the lipase, sweetheart, and rule out pancreatitis.”
“It’s not pancreatitis,” Trinity insists, her voice tight, her pride clearly bruised.
Greg tilts his head, his smirk sharpening into a predatory grin. “What is it, then?”
Trinity opens her mouth. She closes it. She glares at the homeless amputee sitting in the wheelchair, completely and utterly lacking a differential diagnosis of her own. With a frustrated huff, she spins on her heel and marches away toward Bay 12.
Dennis lets out a long exhale, dropping his hand from his face. He knows Trinity. She is stubborn, but she is a good doctor; they will absolutely get a lipase add-on request sent to the lab within the next two minutes.
“Are you still hungry?” Dennis asks, utterly exhausted by the whirlwind of the last five minutes.
Greg nods shamelessly, his victory making him suddenly agreeable. “I could definitely eat more.”
Dennis grabs the handles of the wheelchair and pushes Greg away from the nurses' station, steering him down the quieter hallway toward the staff break room. He pushes the door open to find Mateo standing by the coffee machine and talking with Samira over some pastries.
“Oh, look! My good, dear friend Mateo,” Greg announces loudly as they roll into the room, spreading his arms wide.
Mateo frowns, his coffee cup freezing halfway to his mouth. He looks deeply confused, having only interacted with the man while he was yelling about a broken crutch and briefly at chairs.
Dennis laughs, shaking his head. “Be good, Greg,” he warns, parking the wheelchair near the small laminate table. “I’ll come get you when the lab results post.”
Greg ignores the warning, looking around the small, sterile room with growing dismay. “Can I watch TV?” he asks Dennis hopefully.
“There is no TV in the break room,” Dennis tells him, walking over to the staff fridge to raid his own lunch bag. He pulls out another turkey sandwich and grabs a second juice box, setting them on the table in front of Greg.
Greg gasps, looking genuinely appalled. “What kind of underfunded, understaffed hellhole is this? You people save lives and you don’t even get basic cable?”
Samira chuckles into her coffee mug, leaning against the counter as she watches the bizarre interaction.
Dennis just laughs, holding his hands up in defeat as he backs toward the door. “Behave!” he tells Greg one last time, pointing a stern finger at the older man.
With that, Dennis slips out of the break room, rushing back into the chaotic fray of the ER to actually do his job, leaving a dangerously bored medical genius in a room full of potential targets. Oh, well, not his problem anymore.
Dennis pulls off his gloves and tosses them into the biohazard bin, his heart still beating a rapid, steady rhythm against his ribs as he steps out of Trauma 2. Dr. Robinavitch is right behind him, the heavy glass doors closing with a quiet snick.
“That was a clean airway, Whitaker,” Robby praises, his deep voice easily cutting through the ambient noise of the ER corridor. “Your intubation time is down by at least ten seconds from last month. You didn't even hesitate when the vocal cords spasmed.”
Dennis ducks his head, suddenly extremely interested in the floor under his feet, pretending he isn’t feeling hot all over from the praise. It is a well-known, barely-kept secret among the staff that Dennis is the Chief’s favorite resident, but Dennis tries his hardest not to let his completely inappropriate, entirely one-sided crush on the older man show. Robby is a legend at PTMC –brilliant, commanding, and unfairly handsome for a man in his mid-fifties, and Dennis is only human.
Before Dennis can formulate a professional, entirely normal response, a voice cuts through the tension.
“Your sugar daddy was wrong,” Trinity announces, stepping directly into their path.
Dennis groans, his brief moment of professional pride instantly evaporating. “He can’t be a sugar daddy, he’s literally living in a government-issued studio apartment, Trin,” Dennis tells her, rubbing the back of his neck as he reaches for the tablet she is holding.
“I feel like I missed something important,” Robby complains, his brow furrowing as he looks between the two residents. He sounds only half amused, the Chief of the ER persona slipping back into place. “Is there something happening in my ED that I should know about?”
Dennis glances at Trinity warningly, silently begging her to drop it. But his best friend’s dark eyes are shining with absolute, vindictive mischief.
“Your absolute favorite here,” Trinity says, practically purring the word as she gestures to Dennis, “has been running around all shift with what I can only assume is a disgraced, unlicensed doctor, and using him to diagnose my patient.”
“Gregory Wilson?” Robby asks, his voice dropping an octave.
Dennis nods miserably, returning the tablet to Trinity after confirming the numbers himself. The lipase is completely normal. Pancreas is fine. Greg was wrong. “He is smart, Chief, and he gets bored,” Dennis tries to defend the man, his hands fluttering nervously. “But he helped Dr. McKay in the chairs! He cleared the triage backlog by almost a whole hour!”
Robby’s eyes widen slightly. “He was attending to patients?” he asks, his tone suddenly dead serious. Liability lawsuits flash visibly behind his eyes.
“McKay was attending the patients,” Dennis corrects quickly, his heart rate spiking again for an entirely different reason. “Greg was just... verbally assisting her with possible diagnoses from a safe distance.”
It is a lie. A big, fat, shameful lie that Dennis will absolutely have to repent for later. McKay had practically let Greg run the entire fast-track clinic while she played highly amused secretary.
“Besides, it’s not like Trinity knows what her patient actually has,” Dennis points out defensively, trying to shift the heat.
Trinity gasps, clutching the tablet to her chest as if physically wounded. “I followed all the right protocols! The FAST scan was clear, the lipase is normal, and I'm treating the fever and the hypotension!” she tells him –well, she tells Robby, seeking validation from the boss.
“I know that, Santos,” Robby tells her, his tone softening into something more placating. “We treat the acute symptoms down here in the Pitt. Finding out the obscure, underlying illnesses is an upstairs problem for Internal Medicine. Now, where exactly is Mr. Wilson?”
Dennis winces. “I left him in the break room...”
They don't find Greg in the break room.
Instead, they find him three corridors down, tucked into a quiet, secondary nurses' station that is currently unstaffed. Greg has discarded the spare white coat. He is sitting in the wheelchair, pulled right up to the desk, aggressively typing on a logged-in terminal.
“Hey!” Trinity snaps, marching forward. “You can't be on that! That's a HIPAA violation!”
Greg doesn't even flinch. He just clicks the mouse, his eyes reflecting the blue glow of the monitor. “Relax, sweetheart. A nurse named... ‘Admin’ left herself logged in. Very generous of her.” He doesn't look away from the screen as they approach. “I assume you’re here to gloat about the lipase?”
“It was normal,” Trinity says, crossing her arms with a smug, triumphant smile. “No pancreatitis. Your hypercalcemia theory is busted.”
“It’s not busted, it’s refined,” Greg corrects smoothly, finally leaning back in the wheelchair and spinning it around to face them. He completely ignores Robby's imposing presence, his sharp eyes locking onto Dennis. “The calcium is still sky-high, the blood pressure is still tanking, and she is still burning up. If it's not the pancreas reacting to the calcium, then what is generating the calcium and causing the systemic crash?”
Dennis frowns, stepping closer to look at the screen. Greg has pulled up Elena’s abdominal CT scan from three years ago –records pulled from the depths of the PTMC archives.
“Look at the right kidney,” Greg orders, pointing a long finger at the screen. “Three years ago, she came in for a minor car accident. They did a full body scan. See that little shadow on the superior pole of the right adrenal gland? Three centimeters. The radiologist noted it as an incidental, benign adenoma and ignored it.”
“Because it was benign,” Trinity argues, squinting at the screen. “Lots of people have incidental adrenal masses.”
“It was benign,” Greg agrees, a dark, thrilling excitement vibrating in his chest. “But tumors grow. And sometimes, they outgrow their own blood supply. It’s a pheochromocytoma.”
Dennis’ breath catches. A pheo. A rare tumor of the adrenal gland tissue that secretes massive amounts of hormones.
“The tumor is necrotizing,” Greg explains, his voice picking up speed, the words flowing like a masterclass lecture. “It’s dying from the inside out. As the tissue breaks down and rots, it’s uncontrollably leaking massive, toxic amounts of catecholamines –adrenaline and noradrenaline– directly into her bloodstream. It’s causing a systemic inflammatory response syndrome. SIRS.”
Greg looks at Trinity, his eyes burning with absolute, irrefutable certainty. “It’s not an infection. It never was. It’s a tumor throwing a massive, toxic tantrum, and the referred pain in her shoulder is the necrotic tissue irritating the diaphragm. She needs an alpha-blocker to stabilize her pressure, and then she needs an oncology surgeon to cut that rotting time bomb out of her abdomen before she strokes out.”
The station goes dead silent. The only sound is the distant beeping of a heart monitor down the hall.
Dennis is staring at Greg, his mind blown by the elegant, terrifying, flawless logic of the diagnosis. Trinity is staring at the CT scan, her mouth slightly open, already mentally calculating the drug dosages to save her patient.
But Robby –Robby is just staring at Greg.
Dennis watches from the corner of his eye as the Chief of the ED slowly takes in the man in the wheelchair. Robby looks at the missing right leg. He looks at the sharp, caustic, deeply lined face. He replays the sheer, arrogant brilliance of the diagnostic pivot, the utter disregard for rules… The older doctor's eyes widen a fraction of an inch, his posture stiffening. A look of profound, almost reverent shock washes over Robby's handsome face.
Instead of calling security, instead of demanding answers, Robby just swallows hard. He composes his face, looking from Greg to Trinity.
“Santos,” Robby says, his voice perfectly even, though Dennis can hear the slight tremor of adrenaline beneath it. “Push phentolamine to control the catecholamine surge, and page Surgical Oncology for an emergency consult.”
Trinity blinks, snapping out of her daze. “Yes, Boss” She turns on her heel and practically runs back toward Bay 12.
Robby looks back down at Greg. The two men stare at each other for a long, heavy moment. “Good catch... Mr. Wilson,” Robby says quietly.
Greg just smirks, turning back to the computer to log out. “Just doing my civic duty, Dr. Robinavitch.”
For the rest of the shift, Robby doesn’t complain when he catches Dennis hovering around Greg in the fast-track clinic. In fact he doesn't intervene at all. He just watches. Dennis catches Robby staring from down the hall from time to time, his expression unreadable, though Dennis is usually too distracted to dwell on it. He is completely mesmerized by Greg’s genuinely appalling bedside manner and his terrifying, lightning-fast ability to diagnose.
When the final hour of the concussion protocol is officially over, Dennis pulls Greg into an empty bay to assess him one last time. He shines the penlight, checks the reflexes, and asks the standard cognitive questions, secretly wishing he could just keep the man around for the rest of his residency. But Greg passes with flying colors, so Dennis dutifully signs the discharge papers.
"So," Dennis starts, pushing the wheelchair through the doors toward the discharge garage, where an Uber Dennis is paying for will be pulling up shortly to drive the older man home. The cool evening air is a welcome relief after the stifling, recycled oxygen of the ER. "How was your day?"
Greg snorts, his thumb running critically over the handle of the standard-issue aluminum forearm crutch Dennis had managed to requisition from physical therapy. "I actually enjoyed it," Greg admits, his voice dropping some of its usual caustic armor. He looks up at Dennis, his blue eyes surprisingly sincere. "Thank you, Dennis. For the day."
Dennis pauses, genuinely taken aback by the candid gratitude. A warm, proud smile spreads across his face. "I learned a lot today," he tells the older man honestly. "You are an incredible doctor, Greg."
Greg immediately deflects the emotional weight of the moment, lifting the crutch and glaring at it. "I still hate the metal one. It clicks on the pavement. It lacks gravitas."
"I know," Dennis chuckles, shaking his head. "I’ll track down a proper wooden one for you soon. I’ll see you in a couple of days for your weekly check anyway."
A silver sedan pulls up to the curb, the hazard lights blinking. Dennis sets the brakes on the wheelchair and offers a steadying arm, helping the older man up from the seat. Greg grunts with the effort, shifting his weight awkwardly until he is balanced on his good leg and the hated aluminum crutch.
Before Dennis can open the car door, Greg stops. He turns his head, fixing Dennis with a heavy, calculating stare.
"You are a good doctor, Dennis," Greg tells him, the words deliberate and sharp. "I would have absolutely hated teaching you back in my day. You care too much. You're too soft, and you apologize when you're right."
Dennis opens his mouth to defend himself, but Greg cuts him off with a rare, lopsided smirk.
"But," Greg continues, his voice softening just a fraction, "you're smart enough to actually listen. I would have enjoyed having you on my team."
Dennis blushes furiously, a rush of heat flooding his cheeks at the magnitude of the compliment. Coming from Greg, it feels like winning a prize. He doesn't trust his voice to reply, so he just nods, gently helping the older man maneuver into the backseat of the car. He hands Greg the crutch, closes the door firmly, and steps back onto the curb.
Dennis stands in the cool garage for a long moment, watching the taillights of the Uber disappear into the chaotic city traffic. He smiles to himself, turning back toward the sliding doors of the hospital. He has a mountain of charts to finish, but it doesn't matter. He'll see the grumpy, brilliant phantom in a couple of days anyway.
Two days later, Dennis unlocks the door to Greg's apartment using the spare key he’s kept on his ring for months. He balances a heavy canvas tote bag over his shoulder –stuffed with two textbooks he thinks Greg will devour– while carrying a greasy paper bag of Chinese takeout in his other hand. He intentionally saved Greg for the very last stop on his outreach route today.
The studio is exactly as it always is. Suffocatingly dim, the curtains drawn tight against the late afternoon sun. The television is murmuring some meaningless daytime talk show at a low volume, casting a flickering, pale light over the room. The air is thick with stale dust and a heavy sense of neglect. Greg is sitting in his usual armchair, the hated aluminum forearm crutch propped against the peeling wallpaper beside him. He is wearing the exact same threadbare sweater Dennis saw him in two days ago at the hospital. His eyes are fixed blankly on the screen, though it's obvious he isn't actually watching it.
"Delivery," Dennis announces, toeing the door shut behind him and holding up the paper bag. "Chinese. Extra pork dumplings, just like you like. And your weekly medication shipment."
Greg doesn't turn his head. "You're early."
"I wanted to check on my favorite patient," Dennis says smoothly, moving into the small kitchenette area.
"Your only patient who doesn't try to pay you in crocheted coasters, you mean," Greg mutters, finally tearing his eyes away from the television.
"I happen to like the coasters," Dennis smiles, setting the food on the small, scratched coffee table and pulling up a rickety wooden chair. He starts unpacking the little white cardboard containers, the familiar, quiet routine of their weekly visits settling comfortably into place. For a long moment, neither of them speaks. The only sounds in the apartment are the scrape of cardboard, the snapping apart of wooden chopsticks, and the television's white noise.
Greg accepts the container of lo mein Dennis hands him. He eats mechanically at first, staring into the middle distance, then with more focused interest as the MSG hits. Dennis eats his own food, watching the older man from the corner of his eye, waiting for the right moment.
"I checked up on Elena Vega," Dennis offers finally, breaking the silence. "They took her up to surgery yesterday morning. The mass was exactly what you said it was. A necrotic pheochromocytoma. The lead surgeon told Trinity that if they had waited another twenty-four hours to intervene, she would have coded and never woken up."
Greg chews slowly. He swallows. He doesn't look up from his noodles. "Good."
"The attending in Surgical Oncology asked who caught the tumor on the old scans," Dennis continues, a fond smile pulling at his mouth. "Trinity panicked and almost said your name. I had to jump in and invent a fake consultant from a community hospital in Scranton to cover for you."
That earns a genuine, breathy snort from the older man. "Scranton?"
"You look like a Scranton."
"I do not look like a Scranton. I look like a distinguished academic."
"You currently look like a Scranton who desperately needs a haircut," Dennis counters easily.
Greg sets his food container down on the table, and for a fleeting second, something complex flickers across his heavily lined face. Something raw, vulnerable, and incredibly sad, quickly suppressed behind a mask of caustic indifference. He reaches into the tote bag for the plastic ziplock of medications Dennis brought, sorting through the orange pill bottles with practiced, sharp efficiency, checking the labels against an invisible mental inventory.
"This metal crutch clicks," Greg says abruptly, staring hard at the bottles.
"I know. I told you I'd find a wooden one for you."
"I want the wooden one."
"I know, Greg," Dennis says softly, his voice gentle. He doesn't take the bait. He knows the sudden pivot to complaining is just Greg running away from the emotional weight of having saved a woman's life.
A heavy beat of silence stretches between them.
Then, much quieter, barely audible over the hum of the refrigerator: "I missed it."
Dennis stills completely. He lowers his chopsticks. He doesn't push, doesn't prompt, doesn't offer a platitude. He just waits. It's the way he has learned to be with Greg –patient, present, and completely unjudging– until the skittish, brilliant man feels safe enough to actually speak his mind.
Greg doesn't look at him. His long, calloused fingers trace the edge of a gabapentin label, spinning the little orange bottle round and round on the table. "Being a doctor," he clarifies, his voice thick with a sudden, overwhelming emotion. "I always thought..." He stops. He swallows hard, his throat working, and starts again. "I always thought that what I'd miss the most was the puzzle. The intellectual stimulation. The absolute thrill of finding the one-in-a-million zebra that no one else in the room could see."
Dennis stays very still, barely daring to breathe, bearing witness to the ghost of a great man.
Greg's voice drops to a rough, broken whisper. "But that's not it. Or... it's not all of it." He finally looks up. His bright blue eyes are older than his years, the profound, agonizing grief that Dennis has always heard in his voice finally visible on his face. "I missed having a team. Having someone to argue with. Having a reason to get out of the damn chair." His jaw tightens, a muscle feathering in his cheek. "And I missed... making someone's day better. Even if it was just giving them an answer to their misery. Even if they never knew it was me."
Dennis swallows hard around the sudden, heavy thickness in his throat. He doesn't offer pity, and he doesn't try to fill the silence with empty comforts. Instead, he reaches down into his canvas tote bag –his personal bag, not the PTMC outreach kit– and pulls out three massive, heavy textbooks.
He sets them on the scratched coffee table, right between the containers of cooling noodles. Harrison's Principles of Internal Medicine, the absolute latest edition, and a thick, newly bound quarterly journal on complex infectious diseases.
Greg stops breathing. He just stares at them.
"The hospital library was updating their collection," Dennis says, aiming for casual and missing by a mile. It is a terrible lie, and they both know it. The spines are uncreased, the covers gleaming and pristine, smelling of fresh ink and new paper. "These were going to be recycled. I thought you might want something new to read, since daytime television is clearly rotting your brain."
Greg doesn't call him out on the lie. He doesn't say a word. Slowly, almost reverently, he reaches out and pulls the heavy Harrison's toward him. His long thumb traces the spine, feeling the friction of the lettering. He opens it to a random page, his eyes instantly locking onto the dense, two-column text with a ravenous hunger Dennis recognizes perfectly– it's the exact same hunger he saw flare to life in the triage clinic, the same sharp, undeniable focus.
"They've changed the diagnostic staging for sarcoidosis," Greg murmurs slowly, his eyes darting back and forth across the glossy page.
"Yeah," Dennis nods, keeping his voice carefully neutral. "They reclassified it a few years back based on new radiographic criteria. The old system you're used to is completely outdated."
Greg turns another page. Then another. His fingers are steady, turning the paper with the practiced grace of a scholar, but Dennis can see the faint tremor in his jaw. He can see the immense, crushing effort it is taking the older man to hold the dam back, to keep the raw emotion from spilling over.
"You could quiz me," Dennis offers quietly, leaning back in his rickety chair. "Next week. If you want to. God knows I need the help prepping for my boards."
Greg snaps the heavy book shut. He doesn't look up from the cover, but his voice is rough and guarded around the edges when he finally speaks. "You're too soft, Dennis. You'd let me win out of pity."
"I'd let you think you won," Dennis corrects him smoothly. "There's a massive difference. One is pity; the other is superior psychological warfare."
That earns a laugh. It’s a real one –short, rusty, and slightly breathless, like an engine turning over after years of disuse.
Greg finally looks up from the books, meeting Dennis’ gaze, and for a fleeting, profound moment, the misanthropic mask slips completely. The bitter, grieving phantom vanishes, leaving only a brilliant, tired man sitting in a dim studio apartment.
"Thank you," Greg says. It isn't sarcastic. It isn't a deflection. It's just a man, deeply alone, thanking someone for finally seeing him.
Dennis nods, entirely untrusting of his own voice. He stands up, quickly gathering the empty takeout containers and wiping down the small patch of the table with a napkin. He moves toward the front door, the familiar weight of his outreach kit slung over his shoulder. When he reaches the doorknob, he pauses, looking back.
"I'll see you next week, Greg," Dennis says softly. "Try not to break the new crutch before then."
Greg is already completely absorbed in the Harrison's again. He has reached over and snapped on a small, rusted gooseneck lamp, casting a pool of warm, golden light across the crisp pages and leaving the murmuring television entirely forgotten in the shadows. He doesn't look up, but his voice follows Dennis to the door.
"It clicks, Denny."
"I know," Dennis says, a fond, enduring smile spreading across his face. "I'll fix it."
He steps out into the hallway, closing the door softly behind him, leaving the doctor to his work.