Goran Visnjic Dr. Luka Kovac Actor Maura Tierney Abby Lockhart Actor Mekhi Phifer Dr. Gregory Pratt Actor Parminder Nagra Dr. Neela Rasgotra Actor Linda Cardellini Nurse Samantha Taggart Actor Scott Grimes Dr. Archie Morris Actor John Stamos Dr. Tony Gates Actor Aida Turturro Sheryl Hawkins Guest Star David Lyons Dr. Simon Brenner Guest Star Leland Orser Dr. Lucien Dubenko Guest Star Gina Ravera Dr. Bettina DeJesus Guest Star Marina Benedict Lois Landry Guest Star Beth Broderick Edith Landry Guest Star Sam McMurray Mike Landry Guest Star Charlotte Rae Roxanne Gaines Guest Star Laura Cerón Nurse Chuny Marquez Guest Star Christopher Chulack Executive Producer Michael Crichton Executive Producer David Zabel Executive Producer John Wells Executive Producer R. Scott Gemmill Executive Producer