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. Tali Mayfield 2 guest appearances Capt. Richard Carey 2 guest appearances James Merrick 2 guest appearances Lt. Cmdr. Teresa Coulter 2 guest appearances Big Bud Roberts 2 guest appearances Lt. Cmdr. Tracy Manetti 2 guest appearances Kevin Lee 2 guest appearances Jenny 2 guest appearances Captain Howell 2 guest appearances Dunsmore 2 guest appearances Larry Kaliski 2 guest appearances Dr. Chataway 2 guest appearances Nurse #2 2 guest appearances NCIS Special Agent Vivian Blackadder 2 guest appearances Tom Morrow 2 guest appearances Dr. Donald Mallard 2 guest appearances Pappas 1 guest appearances Dr. Morris Sperling 1 guest appearances Lillian Dorning 1 guest appearances Sahiba Khalili 1 guest appearances ⇤ « 1 2 3 4 5 6 7 8 9 10 » ⇥