Dana Delany Dr. Megan Hunt Actor Jeri Ryan Dr. Kate Murphey Actor Mark Valley Detective Tommy Sullivan Actor Geoffrey Arend Dr. Ethan Gross Actor Windell Middlebrooks Dr. Curtis Brumfield Actor Elyes Gabel Detective Adam Lucas Actor Mary Mouser Lacey Fleming Actor Luke Perry Guest Star Shawn Hatosy Guest Star Henry Ian Cusick Guest Star Marisa Ramirez Guest Star Lorraine Toussaint Guest Star Annie Wersching Guest Star Jonathan Banks Guest Star Rosa Salazar Guest Star Khary Payton Guest Star Richard Burgi Guest Star Adilah Barnes Guest Star Joanna Cassidy Guest Star Paul Telfer Guest Star Christopher Murphey Executive Producer, Writer Matthew Gross Executive Producer Sunil Nayar Executive Producer Diane Ademu-John Writer Alexi Hawley Writer Allen MacDonald Writer Corey Miller Writer Evan Katz Writer Matthew L. Lewis Writer Corey Miller Writer John Terlesky Director Christine Moore Director Alex Zakrzewski Director Ralph Hemecker Director David Von Ancken Director Milan Cheylov Director Michael Grossman Director Sam Hill Director Eric Laneuville Director