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 Alexis Denisof Daniel Larson Guest Star Alexandra Holden Laura Larson Guest Star Bess Wohl Amy Larson Guest Star Kim Hamilton Frances Guest Star Billy Dee Williams Henry Guest Star David Sutcliffe Officer Kevin Nelson Guest Star John Eddins Burly Cop Guest Star Mike Madrigal Construction Worker Guest Star Hailey Sole Betsey Parker Guest Star Shonda Rhimes Executive Producer Betsy Beers Executive Producer Marti Noxon Executive Producer Mark Gordon Executive Producer Mark Tinker Executive Producer Emily Halpern Writer Joanna Kerns Director