Mekhi Phifer Dr. Gregory Pratt Actor Maura Tierney Abby Lockhart Actor Linda Cardellini Nurse Samantha Taggart Actor Goran Visnjic Dr. Luka Kovac Actor Parminder Nagra Dr. Neela Rasgotra Actor Shane West Actor Scott Grimes Dr. Archie Morris Actor Laura Innes Dr. Kerry Weaver Actor Kristen Johnston Actor Leland Orser Dr. Lucien Dubenko Guest Star Jessica Hecht Stephanie Lowenstein Guest Star China Shavers Olivia Evans Guest Star Laura Cerón Nurse Chuny Marquez Guest Star Deezer D Nurse Malik McGrath Guest Star Troy Evans Frank Martin Guest Star April L. Hernandez Nurse Inez Guest Star Jillian Bach Penny Nicholson Guest Star Jordan Calloway K.J. Thibeaux Guest Star Michael Dempsey Mr. Beckwith Guest Star Elizabeth Sampson Norma Beckwith Guest Star John Wells Executive Producer Michael Crichton Executive Producer Neal Baer Executive Producer Jack Orman Executive Producer