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 Karri Turner Ensign, Lt. j.g. Harriet Sims Guest Star Charles Hoyes Guest Star Ilia Volok Guest Star Natasha Pavlovich Guest Star Leeza Vinnichenko Guest Star Steven Culp Guest Star Cliff DeYoung Guest Star Rex Linn Guest Star Paul Collins Guest Star Vladimir Skomarovsky Guest Star Allan Kolman Guest Star Eric Zivot Guest Star Donald P. Bellisario Executive Producer, Writer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Tony Wharmby Director