Anthony Edwards Dr. Mark Greene Actor Eriq La Salle Dr. Peter Benton Actor Noah Wyle Dr. John Carter 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 Sally Field Maggie Wyczenski Guest Star Toy Connor Kynesha Guest Star Ellen Crawford Nurse Lydia Wright Guest Star Alan Dale Al Patterson Guest Star Laura Cerón Nurse Chuny Marquez Guest Star Kristin Minter Randi Fronczak Guest Star Kyle Richards Nurse Dori Guest Star Joe Basile Officer Tom Bennini Guest Star Mark Hutter Mark's Doctor Guest Star Roberta Valderrama Stephanie Guest Star John Wells Executive Producer Michael Crichton Executive Producer Neal Baer Executive Producer Jack Orman Executive Producer