Kate Walsh Dr. Addison Montgomery Actor Tim Daly Dr. Pete Wilder Actor Audra McDonald Dr. Naomi Bennett Actor Paul Adelstein Dr. Cooper Freedman Actor, Director Kadee Strickland Dr. Charlotte King Actor Brian Benben Dr. Sheldon Wallace Actor Caterina Scorsone Dr. Amelia Shepherd Actor Taye Diggs Dr. Sam Bennett Actor Amy Brenneman Dr. Violet Turner Actor Alex Kingston Dr. Marla Thomkins Guest Star Louise Fletcher Frances Wilder Guest Star Kyle Secor Adam Wilder Guest Star Vanessa Marano Casey Guest Star Tom Bower Dennis Hoffman Guest Star Laura Wiggins Lisa Guest Star Michael Grant Patrick Hoffman Guest Star Lizabeth Allen Terri Guest Star Anne Marie Howard Pam Guest Star Timi Prulhiere Ricky Guest Star Shonda Rhimes Executive Producer Betsy Beers Executive Producer Mark Gordon Executive Producer Mark Tinker Executive Producer Craig Turk Executive Producer Steve Blackman Executive Producer Jennifer Cecil Writer