David James Elliott Lt., Lt. Cmdr. Harmon "Harm" Rabb, Jr. Actor Catherine Bell Maj., Lt. Col. Sarah "Mac" MacKenzie 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 Allison Gammon Guest Star Dave Florek Guest Star David Goryl Guest Star Indira Gibson Guest Star Jordana Spiro Guest Star Perry Wolberg Guest Star Tom Wright Guest Star Christian J. Meoli Guest Star Eric Lange Guest Star Ivar Brogger Guest Star Kristin Bauer Guest Star Todd Truley Guest Star Danny Mora Guest Star David Andrews Maj. Gen. Gordon "Biff" Cresswell Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Mark Horowitz Executive Producer Kenneth Johnson Director Philip DeGuere Jr. Writer Darcy Meyers Writer