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 Alexei 2 guest appearances Col. Mikhail Parlovsky 2 guest appearances Maj. Nikolai 2 guest appearances Ernie McGill 2 guest appearances LCDR Jordan "Jordi" Parker 2 guest appearances Chief of Chaplains 2 guest appearances Airman Griggs 2 guest appearances CAPT Pike 2 guest appearances Sergei Zhukov 2 guest appearances Capt. Alex Volkonov 2 guest appearances CDR Stacy Loftness 2 guest appearances Air Boss 2 guest appearances Seahawk Pilot 2 guest appearances Stuart Dunston 2 guest appearances Kabir Atef 2 guest appearances CIA Director Norman Watts 2 guest appearances Sadik Fahd 2 guest appearances Edward Hardy 2 guest appearances Capitan Jose Molina 2 guest appearances Tom Johnson 2 guest appearances ⇤ « 1 2 3 4 5 6 7 8 9 10 » ⇥