Dana Delany Dr. Megan Hunt Actor Jeri Ryan Dr. Kate Murphey Actor Mark Valley Detective Tommy Sullivan Actor Elyes Gabel Detective Adam Lucas Actor Geoffrey Arend Dr. Ethan Gross Actor Windell Middlebrooks Dr. Curtis Brumfield Actor Mary Mouser Lacey Fleming Actor Luke Perry Guest Star Lorraine Toussaint Guest Star Marisa Ramirez Guest Star Sarah Jane Morris Guest Star José Zúñiga Guest Star Chris Johnson Guest Star Heather McComb Guest Star Sunkrish Bala Guest Star Paul Telfer Guest Star Joanna Cassidy Guest Star Christopher Murphey Executive Producer Matthew Gross Executive Producer Sunil Nayar Executive Producer Diane Ademu-John Writer John Terlesky Director