The series is set inside the chaotic pressure cooker of Pittsburgh’s Trauma Medical Center. Here, the emergency department is perpetually overcrowded, chronically underfunded, and staffed by people who are running on three hours of sleep and pure adrenaline.
At the center of the storm is Dr. Michael 'Robby' Robinavitch (Noah Wyle), a veteran physician trying to hold the crumbling department together. Alongside him is Dr. Frank Langdon (Patrick Ball), the sharp Charge Nurse Dana Evans (Katherine LaNasa), and a brilliant but overwhelmed team of residents and specialists, including Dr. Samira Mohan (Supriya Ganesh), Dr. Cassie McKay (Fiona Dourif), Dr. Melissa King (Taylor Dearden), and Dr. Trinity Santos (Isa Briones). Rounding out the crew is the green-around-the-gills student doctor Dennis Whitaker (Gerran Howell), who serves as our audience surrogate for the absolute madness of the graveyard shift.


























