David James Elliott Lt., Lt. Cmdr. Harmon "Harm" Rabb, Jr. Actor, Director Catherine Bell Maj., Lt. Col. Sarah "Mac" MacKenzie Actor John M. Jackson Actor Patrick Laborteaux Lt. j.g., Lt. Bud Roberts Actor Karri Turner Ensign, Lt. j.g. Harriet Sims Actor Scott Lawrence Cmdr. Sturgis Turner Actor Zoe McLellan Petty Officer Jennifer Coates Actor Hallee Hirsh Guest Star Steven Culp Guest Star John Walcutt Guest Star John DeMita Guest Star Michael Cudlitz Guest Star Brent Sexton Guest Star Ethan Phillips Guest Star Barbara Eve Harris Guest Star Ben Allison Guest Star Molly Hagan Guest Star Jeff D'Agostino Guest Star Dayna Devon Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Mark Horowitz Executive Producer Darcy Meyers Writer