Many of Bellisario's protagonists are current or former members of the United States armed forces. Tom Selleck's character in "Magnum, P.I." was a United States Naval Academy graduate, former Naval Intelligence officer and Vietnam veteran; Jan-Michael Vincent's character in "Airwolf" was a Vietnam veteran; Commander Harmon "Harm" Rabb, Jr., the main character of "JAG", was a Naval Academy graduate and former Naval Aviator; and "NCIS"s main character, Leroy Jethro Gibbs, is a retired Marine Corps Gunnery Sergeant and Scout Sniper; Jake Cutter (Stephen Collins) from "Tales of the Gold Monkey" was a former Flying Tigers pilot; and Albert "Al" Calavicci in "Quantum Leap" was a former Naval Aviator, Vietnam prisoner of war and rear admiral. Several of his main characters share August 8 as their birthday.