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 Jason Beghe Guest Star Jason Brooks Guest Star Philip Anthony-Rodriguez Guest Star Robert Blesse Guest Star Elizabeth Anne Allen Guest Star William Katt Guest Star Hallee Hirsh Guest Star John Walcutt Guest Star Richard McGonagle Guest Star Jess King Guest Star David Reive Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Mark Horowitz Executive Producer Bradford May Director Don McGill Writer