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 John Leguizamo Dr. Victor Clemente Guest Star Danny Glover Charlie Pratt Sr. Guest Star Kristen Johnston Guest Star Leland Orser Dr. Lucien Dubenko Guest Star Kat Dennings Zoe Butler Guest Star Jessica Hecht Stephanie Lowenstein Guest Star Stana Katic Blaire Collins Guest Star Jeffrey D. Sams Dr. Dulcey Watson Guest Star China Shavers Olivia Evans Guest Star Abraham Benrubi Jerry Markovic Guest Star Laura Cerón Nurse Chuny Marquez Guest Star Deezer D Nurse Malik McGrath Guest Star John Wells Executive Producer Michael Crichton Executive Producer Neal Baer Executive Producer Jack Orman Executive Producer