Main Characters Captain Harmon "Harm" Rabb Jr., USN 227 main appearances Captain Bud J. Roberts Jr., USN 96 main appearances Lieutenant Colonel Sarah "Mac" MacKenzie, USMC 99 main appearances Rear Admiral A.J. Chegwidden, USN 86 main appearances Lieutenant Harriet Sims-Roberts, USN 50 main appearances Yeoman First Class (YN1) Jason Tiner, USN 49 main appearances Lieutenant Commander Mic Brumby, CSC, RAN 40 main appearances Gunnery Sergeant Victor Galindez, USMC 37 main appearances Lieutenant Loren Singer, USN 19 main appearances Special Agent Clayton Webb 15 main appearances Commander Peter Ulysses "Sturgis" Turner, USN 20 main appearances Lieutenant, Junior Grade Megan "Meg" Austin, USN 20 main appearances Legalman First Class (LN1) Jennifer "Jen" Coates, USN 10 main appearances Midshipman Third Class Michael "Mikey" Roberts, USNA 3 main appearances Rear Admiral Thomas "CAG" Boone, USN 3 main appearances Major General Gordon "Biff" Cresswell, USMC 4 main appearances Commander Caitlin "Kate" Pike, USN 2 main appearances Lieutenant Gregory Vukovic, USN 2 main appearances
Recurring Guest Characters Lt. Purcell 1 guest appearances Lt. Archuleta 1 guest appearances Petty Officer Sean Curran 1 guest appearances Mr. Handy 1 guest appearances Prof. Alessandro Selvaggio 1 guest appearances Diamond Saleswoman 1 guest appearances CIA Agent Bartus Van Duyn 1 guest appearances Lt. Theo Maravalis 1 guest appearances Hasidic Man 1 guest appearances Partner 1 guest appearances Andre Biggs 1 guest appearances Captain Max Engler 1 guest appearances Sheik Shuhaib Al-Hassan 1 guest appearances Paul Revere 1 guest appearances Adm. Caleb Stanton, Ret. 1 guest appearances Gunnery Sergeant Krycek 1 guest appearances Mrs. Peterson 1 guest appearances Pops Grahowsky 1 guest appearances Gen. Nathan Behnke 1 guest appearances Lt. Alexander Kellogg 1 guest appearances ⇤ « 31 32 33 34 35 36 37 38 39 40 » ⇥