Rabb was a lieutenant commander and commander for most of the series' run. A Marine lawyer, who later became chief of staff under Chegwidden and Cresswell, partnered with "Harm" and became his best friend and constantly dealt with "whatever" it was between the two officers."Mac" had the gift of gab and great tenacity in the courtroom for justice but somehow always had trouble with the men in her life.Rabb was subsequently charged with murder but was eventually cleared when NCIS Special Agents Anthony Di Nozzo and Vivian Blackadder found the real culprit.It was revealed during the interrogation of Lindsey that he was not the father of LT Singer's baby. Friend and colleague of Harm's father whom Rabb saves from court martial several times.In Season 3, he showed slight romantic interest in Mac but their friendship and UCMJ implications caused them to nip it in the bud. He had an Italian ex-wife and daughter who were featured in a kidnapping plot in the Season 4 episode "Going After Francesca." He loved baseball and once mentioned he was drafted by the Cleveland Indians, but declined a contract in order to serve his country during wartime. Austin was the second partner to LT Harmon Rabb, replacing LT JG Caitlin Pike. She also confronted LT Singer about leaking the information on the case, saying Singer did NOT have her forgiveness. The first Judge Advocate General of the Navy in the series, with a weird sense of humor. It was later revealed that the Admiral had no confidence in his abilities, and A. in fact made a point of denying Lindsey a promotion at a Season 6 Review Board.He was nominated for a seat on a high-level civilian court but turned it down after being confronted with the unethical positions of the Congressman who nominated him. NBC cancelled the series then when CBS picked it back up she was replaced by Lt. Pike is a graduate of the United States Naval Academy and Harvard Law School. His aide, CDR Theodore Lindsey, was often the butt of his jokes. Nelson's successor, Senator Edward Sheffield, unaware of Lindsey's grudge, appointed Lindsey to audit JAG headquarters. Lindsey recommended that most of the senior staff be reassigned.
He was promoted three times during the series' run, being first introduced in the pilot episode as a lieutenant to ending with the rank of captain in second to last episode.
She was also promoted from JAG lawyer to JAG chief of staff, the second in command under Chegwidden and later Creswell.
Until the series finale, she was senior to Rabb by two months. Originally an ensign in charge of Public Affairs at USS Seahawk, who later became a JAG lawyer.
He had a younger brother, Mikey (Michael Bellisario) who had aspirations of being an artist before being accepted into the Naval Academy, and eventually became a radar and gunnery technician.
They had a complex relationship with their father, "Big Bud" Sr.
Harriet is happy go-lucky and gets along with almost everyone, especially Harm and Mac. After spending a Christmas Day with the JAG officers.