Dana Delany Dr. Megan Hunt Actor Jeri Ryan Dr. Kate Murphey Actor John Carroll Lynch Detective Bud Morris Actor Nicholas Bishop Peter Dunlop Actor Sonja Sohn Detective Samantha Baker Actor Geoffrey Arend Dr. Ethan Gross Actor Windell Middlebrooks Dr. Curtis Brumfield Actor Terry Serpico Guest Star Aaron Tveit Guest Star Sean Cullen Guest Star Daniel Sauli Guest Star Sara Botsford Guest Star Christopher Murphey Executive Producer Matthew Gross Executive Producer Sunil Nayar Executive Producer Bryan Oh Writer Nathan Hope Director