David James Elliott Lt., Lt. Cmdr. Harmon "Harm" Rabb, Jr. Actor Catherine Bell Maj., Lt. Col. Sarah "Mac" MacKenzie Actor John M. Jackson Actor Patrick Laborteaux Lt. j.g., Lt. Bud Roberts Actor Karri Turner Ensign, Lt. j.g. Harriet Sims Guest Star Randy Vasquez Guest Star Trevor Goddard Guest Star Chuck Carrington Guest Star Jade Carter Guest Star Stephen Mendel Guest Star Cindy Ambuehl Guest Star Steven Culp Guest Star Greg Watanabe Guest Star Raymond O'Keefe Guest Star Rex Linn Guest Star Aleksandr Kuznetsov Guest Star Christopher Stapleton Guest Star Harrison Page Guest Star Laurence Lau Guest Star Gregory Balaban Guest Star James O'Sullivan Guest Star Nick Baybak Guest Star Anna-Marie Goddard Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer