R. Scott Gemmill Creator, Executive Producer, Writer Noah Wyle Dr. Michael 'Robby' Robinavitch Actor, Executive Producer, Writer Patrick Ball Dr. Langdon Actor Supriya Ganesh Dr. Mohan Actor Fiona Dourif Dr. McKay Actor Taylor Dearden Dr. King Actor Isa Briones Dr. Santos Actor Gerran Howell Whitaker Actor Shabana Azeez Javadi Actor Katherine LaNasa Dana Evans Actor Tracy Ifeachor Dra. Heather Collins Actor Amielynn Abellera Actor Arun Storrs Actor Bess Rous Actor Abby Ryder Fortson Actor Brandon Keener Actor Samantha Sloyan Actor Marguerite Moreau Actor Ashley Romans Actor Shu Lan Tuan Actor Ellen Wroe Actor Simran Baidwan Executive Producer Michael Hissrich Executive Producer Erin Jontow Executive Producer John Wells Executive Producer, Director Amanda Marsalis Director John Cameron Director Silver Tree Director Cynthia Adarkwa Producer Joe Sachs Writer Damian Marcano Director