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 Steven Culp Guest Star Leon Russom Guest Star Meg Wittner Guest Star Robin Thomas Guest Star Jason Behr Guest Star Claudette Nevins Guest Star Gary Hudson Guest Star David Cowgill Guest Star Sam Scarber Guest Star Donald P. Bellisario Executive Producer Raymond Austin Director R. Scott Gemmill Writer