David James Elliott Lt., Lt. Cmdr. Harmon "Harm" Rabb, Jr. Actor, Director 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 Actor Chuck Carrington Actor Scott Lawrence Cmdr. Sturgis Turner Actor Nanci Chambers Actor Isabella Hofmann Guest Star Zoe McLellan Petty Officer Jennifer Coates Guest Star Michael Bellisario Guest Star Jennifer Savidge Guest Star Steven Culp Guest Star Tony Lee Guest Star Dean Stockwell Guest Star Hallee Hirsh Guest Star John DeMita Guest Star Richard McGonagle Guest Star Dan Lauria Guest Star John Walcutt Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer, Writer Mark Horowitz Executive Producer Bradford May Director Dennis Smith Director Jeannot Szwarc Director Thomas L. Moran Writer James Keach Director Stephen Cragg Director LeVar Burton Director Michael Fresco Director Darcy Meyers Writer Matt Witten Writer Kenneth Johnson Director Dana Coen Writer Philip DeGuere Jr. Writer Paul Levine Writer