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 John M. Jackson Actor Trevor Goddard Guest Star Randy Vasquez Guest Star Chuck Carrington Guest Star Cynthia Sikes Guest Star Cindy Ambuehl Guest Star Sean Murray Guest Star Anne-Marie Johnson Guest Star Phil Reeves Guest Star David Hayward Guest Star Ted King Guest Star Coleen Maloney Guest Star Christina Pickles Guest Star Brett Rickaby Guest Star Jennifer Savidge Guest Star Matthew Sutherland Guest Star Jon Curry Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Bradford May Director