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 Actor Scott Lawrence Cmdr. Sturgis Turner Actor Zoe McLellan Petty Officer Jennifer Coates Actor Isabella Hofmann Guest Star John DeMita Guest Star Ariyan Johnson Guest Star Tony Plana Guest Star Gerard O'Donnell Guest Star Michelle Azar Guest Star Spencer Garrett Guest Star Derrex Brady Guest Star Dennis Haskins Guest Star Nolan North Guest Star Tami Roman Guest Star Jillian Chanes Guest Star Destiny Smith Guest Star Donald P. Bellisario Executive Producer Charles Floyd Johnson Executive Producer Stephen Zito Executive Producer Mark Horowitz Executive Producer