Captain Harmon 'Harm' Rabb, Jr., JAGC, USN, is a fictional and lead character in the American television series JAG. In the pilot episode, he is introduced as a young Navy lieutenant serving as a Judge Advocate. The viewer follows his naval career from that point as the series progresses. With the longevity of JAG, plenty of information on his past life and previous military service are given at various points in the series.