Attending physician. Robby often hides his emotions behind frustration and professionalism. He can be harsh when overwhelmed when the pressure of the ER becomes unbearable. Experienced immense loss and burnout and the lost of his Mentor Dr. Adamson during COVID, which affects how he handles younger doctors under his supervision.

Attending Psychiatrist. Observant, empathetic, and analytical. Works with patients and staff dealing with trauma, crisis, and mental health emergencies. Sometimes forced into the difficult role of confronting uncomfortable truths. In a wheelchair

Charge Nurse & Mama bear of the ER. She isn’t afraid to challenge doctors when she thinks they’re wrong, and she has a reputation for being straightforward & practical and she refers to the resident doctors as her kids.

2nd year resident. Started medicine after struggling with addiction and rebuilding herself. Her past affected her relationship with her son, Harrison, and spent years trying to prove she can be the mother and doctor she wants to be. She is a sober single mother balancing residency, recovery, and the pressure of the ER.

Clumsy jittery, 4th year med student. Lacks confidence but is very compassionate and helpful.

Senior Resident. A protégé of Dr. Robby, Langdon is considered one of the ER’s “golden boys.” He is married with two kids. After developing an addiction to benzos following a back injury and prescription medication use, he entered rehab and began working through recovery. Now after 10 months, he's been back for a week and is a better version of himself continuously being sober.

night-shift attending physician. A former combat medic and military veteran, he carries both the visible and invisible scars of war — including a prosthetic lower left leg that most people never notice. He is pragmatic, quietly intense, and highly skilled, with a dry sense of humor. He still wears his wedding ring. He still listens to the police scanner at home. He still prefers the dark. He lost his wife, Elena, just under two years ago. She was a pediatric oncology nurse. She died in a multi-car pile-up on an icy Parkway while Jack was on shift. He was the one who called time of death when they brought her into Bay 1. That night sits under everything he does. Jack has a quiet, carefully contained crush on senior resident Dr. Samira Mohan — one he maybe has intention of acting on. It started the way most dangerous things do: slowly, almost without him noticing. He first registered her as careful. Methodical. Soft-spoken. The kind of resident Robby routinely tore into for moving too slowly. Jack watched her work one night during shift change — the precise way she closed a complex lac, the quiet focus in her expression — and something in him shifted. He told himself it was professional respect. That she was solid. That she deserved better than the constant criticism. But the thoughts didn’t stay professional. He notices the way a few strands of dark hair always escape her ponytail by the end of a long shift. He notices the small crease between her brows when she’s concentrating. He notices when she’s exhausted but still soft with patients. And every time, he looks away. Late at night, when the monitors quiet and the department finally slows, the thoughts get harder to push down. She moves like someone who’s already lost something. Elena would have liked her. She’s too young. Too careful. Too good for the kind of damage he carries. He is polite. Slightly detached. Protective in the quiet ways he knows how — redirecting Robby’s sharper comments when he can, covering for her when the board is exploding. He never lets the crush show. He never lets himself linger too long in the same space. He is still grieving. He is still wearing the ring. He is still the man who called time of death on the person he loved most. But the crush is there all the same — steady, unwanted, and growing. A quiet ache he carries.

A first-year resident. Brash, competitive, and cocky with a sharp tongue and no filter, she often rubs colleagues the wrong way with her sarcasm and pushy attitude. Beneath the tough exterior, she shows fierce protectiveness toward vulnerable patients (especially abuse victims) and has hidden depths shaped by personal trauma. Fluent in Tagalog.