Blair Underwood Dr. Ben Turner Actor Michael Warren Ron Harris Actor Hill Harper Dr. Wesley Williams Actor Phil Buckman Dr. Geoffrey Weiss Actor T.E. Russell Dr. Arthur Jackson Actor Viola Davis Nurse Lynette Peeler Actor Kyle Secor Dr. Raleigh Stewart Actor Tamara Taylor Guest Star Gabrielle Union Dr. Courtney Ellis Actor Gregory Alan Williams Guest Star Bokeem Woodbine Guest Star Lawrence LeJohn Guest Star Mari Weiss Guest Star LaRita Shelby Guest Star Gregg Daniel Guest Star Octavia Spencer Guest Star Arminae Azarian Guest Star Ron Canada Guest Star Sandi Schultz Guest Star Harold Sylvester Guest Star, Writer Steven Bochco Executive Producer, Writer Paris Barclay Executive Producer Nicholas Wootton Producer, Writer Rick Wallace Director Nick Gomez Director Greg Beeman Director Kevin Hooks Director Kenneth Fink Director Dianne Houston Director, Writer Reginald Hudlin Director Jonathan Hiatt Writer Jonathan R. Hiatt Writer Charles Murray Writer