Andre Braugher Dr. Ben Gideon Actor Rubén Blades Dr. Max Cabranes Actor Eric Dane Dr. Wyatt Cooper Actor Russell Hornsby Dr. Aaron Boies Actor Ravi Kapoor Dr. Siddhartha "Sid" Shandar Actor Sophie Keller Actor Hamish Linklater Dr. Bruce Cherry Actor Rhona Mitra Dr. Alejandra "Ollie" Klein Actor Kevin J. O'Connor Actor Elizabeth Wilson Guest Star Nicholas Coster Guest Star Kathleen Wilhoite Guest Star Timothy Bottoms Guest Star Tzi Ma Guest Star Samantha Lloyd Guest Star Adam Alexi-Malle Guest Star Kevin Kelly Guest Star Paul Attanasio Executive Producer Katie Jacobs Executive Producer Eric Ellis Overmyer Executive Producer Samantha Howard Corbin Writer Randy Zisk Director