"JAG" stands for "Judge Advocate General". The office of JAG is a part of the Navy, which according to their official website "provides legal and policy advice to the Secretary of the Navy in all legal matters concerning military justice, administrative law, environmental law, ethics, claims, admiralty, operational and international law, litigation and legal assistance."
During the last half of season 8, Catherine Bell was shown mostly behind a desk or holding something in front of her because she was pregnant. Her character pretended to be pregnant during the last couple of episodes of the 8th season, then threw away the padding during the Season 9 premiere - because Bell had given birth during the summer hiatus.
Was picked up by CBS after being dropped by NBC for low ratings. Became a success soon after.
One episode was shot on the set of Crimson Tide (1995).
Unused footage from movies like Top Gun (1986) and The Hunt for Red October (1990) was used in this TV series.