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 Vanessa Redgrave Dr. Erica Noughton Guest Star Chris Diamantopoulos Chad Myers Guest Star Romy Rosemont Libby Zucker Guest Star Kelsey Batelaan Annie McNamara Guest Star Portia Dawson Kelly Appleton Guest Star Rachael L. Hollingsworth Nicole Watts Guest Star Austin Tichenor Marty Fine Guest Star Jessalyn Gilsig Gina Russo Guest Star Linda Klein Nurse Linda Guest Star Ryan McTavish Young Guy Guest Star