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 David Sutcliffe Officer Kevin Nelson Guest Star Amy Acker Molly Madison Guest Star Cheryl White Robin Miller Guest Star Blake Robbins Mark Miller Guest Star Tyler Patrick Jones Dean Miller Guest Star Drew Rausch Eric Guest Star Diarra Kilpatrick OR Nurse Guest Star Shonda Rhimes Executive Producer, Writer Betsy Beers Executive Producer Marti Noxon Executive Producer, Writer Mark Gordon Executive Producer Mark Tinker Executive Producer, Director