Kate Walsh Dr. Addison Montgomery Actor Tim Daly Dr. Pete Wilder Actor Audra McDonald Dr. Naomi Bennett Actor Paul Adelstein Dr. Cooper Freedman Actor Kadee Strickland Dr. Charlotte King Actor Christopher Lowell William "Dell" Parker Actor Taye Diggs Dr. Sam Bennett Actor Amy Brenneman Dr. Violet Turner Actor Brian Benben Dr. Sheldon Wallace Guest Star Sharon Leal Guest Star Patty McCormack Guest Star Tim Guinee Guest Star Matthew John Armstrong Guest Star Elaine Kagan Guest Star GeffriMaya Guest Star Jay Harrington Guest Star David Sutcliffe Guest Star Darcy Rose Byrnes Guest Star Caleb Moody Guest Star Tyler Jacob Moore Guest Star Shonda Rhimes Executive Producer Betsy Beers Executive Producer Marti Noxon Executive Producer Mark Gordon Executive Producer Mark Tinker Executive Producer, Director Sal Calleros Writer