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 Mary Mouser Lacey Fleming Actor Nathalie Kelley Guest Star Charles Malik Whitfield Guest Star Michael McGrady Guest Star Chrishell Stause Guest Star Robert Irvine Guest Star Jeff Yagher Guest Star Christopher Murphey Executive Producer Matthew Gross Executive Producer Sunil Nayar Executive Producer Matthew V. Lewis Writer John Putch Director