Dylan Walsh Dr. Sean McNamara Actor Julian McMahon Dr. Christian Troy Actor John Hensley Matt McNamara Actor Joely Richardson Julia McNamara Actor Roma Maffia Dr. Liz Cruz Actor Bruno Campos Dr. Quentin Costa Actor Kelly Carlson Kimber Henry Actor Jessalyn Gilsig Gina Russo Guest Star Brittany Snow Ariel Alderman Guest Star Hallee Hirsh Madison Berg Guest Star Valerie Landsburg Marian Berg Guest Star Nancy Lenehan Sue Alderman Guest Star Mercedes Colon Hostess Guest Star Brian Kerwin Eugene Alderman Guest Star Linda Klein Nurse Linda Guest Star Gillian Foreman Wedding guest Guest Star