Anthony Edwards Dr. Mark Greene Actor Noah Wyle Dr. John Carter Actor Eriq La Salle Dr. Peter Benton Actor Laura Innes Dr. Kerry Weaver Actor Alex Kingston Dr. Elizabeth Corday Actor Goran Visnjic Dr. Luka Kovac Actor Maura Tierney Abby Lockhart Actor Paul McCrane Robert Romano Actor Michael Michele Cleo Finch Actor Erik Palladino Dave Malucci Actor Ming-Na Wen Actor Jessica Townsend Alice Jenkins Guest Star Mary McDonnell Eleanor Carter Guest Star Michael Gross John 'Jack' Carter Jr. Guest Star Khandi Alexander Jackie Robbins Guest Star Jeffrey Alan Chandler Mr. Skapinski Guest Star Jerome Butler Talk Show Host Guest Star Conchata Ferrell Mrs. Jenkins Guest Star Tamala Jones Joanie Robbins Guest Star Conni Marie Brazelton Nurse Connie Oligario Guest Star Laura Cerón Nurse Chuny Marquez Guest Star John Wells Executive Producer Michael Crichton Executive Producer Neal Baer Executive Producer Jack Orman Executive Producer