During the last half of season eight, 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 eighth season, then threw away the padding during the season nine premiere, because Bell had given birth during the summer hiatus.
The location for Admiral Chegwidden's house is the Peter Strauss Ranch, operated by the National Park Service in the beautiful Santa Monica Mountains National Recreation Area in Southern California, once owned by actor Peter Strauss. Which was later destroyed in the Woolsey fire in 2018.
During Tracey Needham's time on the show, when wearing her ribbons, she was shown as wearing only the Meritorious Unit Commendation. She should also have been wearing the National Defense Medal, which had been authorized for all service personnel serving during the period August 2, 1990 to November 30, 1995. Tracey Needham first appeared as Lieutenant Junior Grade Meg Austin on September 30, 1995.
David James Elliott (Harmon Rabb, Jr.) appears in every episode of JAG, either as himself, as another character in a flashback, or via voice by phone. He is the only regular cast member to appear in all episodes.
During its first season, the series was co-produced by NBC, in addition to Belisarius and Paramount. NBC obviously did not continue co-producing after the series moved to CBS, and CBS did not take over as a co-producer for NBC either. Though, such a move was made unnecessary by the 2000 merger of CBS and Paramount's parent Viacom. CBS and Viacom split again in 2006, and Paramount's television library, including "JAG", was retained by CBS.
At the end of the last episode, Bud Roberts (Patrick Labyorteaux) flips a JAG coin, which was given to him by Admiral Chegwidden when the Admiral retired. Which has the dates of the years JAG was on 1995 - 2005.
When the series began, Sarah MacKenzie (Catherine Bell) was a Major in the Marines. Shortly thereafter, she was promoted to Lieutenant Colonel, at which rank she retained until the series ended. In the last episode, she was being transferred to San Diego.
"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."
Numerous actors have appeared on this show and NCIS (2003), but in different roles. Notables include: Sean Murray, Muse Watson, Terry O'Quinn, Steven Culp, Michael Bellisario, and Joe Spano. These notables had a significant role in either this show or NCIS (2003), but not necessarily the other. For example, Sean Murray's roles on this show weren't recurring, while he is a regular on NCIS (2003), and Terry O'Quinn's role on this show was recurring, but wasn't on NCIS (2003).
A lot of their submarine (underwater) footage is from either (or both) the movies The Hunt for Red October (1990) and Crimson Tide (1995). Also interesting, that since the show involves almost exclusively the F-14 Tomcat aircraft, in the last video portion of the opening credits, the aircraft performing maneuvers is clearly an F/A Hornet, or Super Hornet, like the Navy Blue Angels fly.
In seasons 2 and 3,the opening credits begin with a commentary, which explains that Rabb was originally an F-14 Tomcat pilot, and crashed during heavy seas, and after being diagnosed with night blindness, he joined JAG. The very first time this commentary is given JAG: We the People (1997) which was the first episode of season 2, Major MacKenzie is not mentioned.
Despite being on the air for ten seasons, and two hundred twenty-seven episodes, the show never had a female director. Although in the first Season Captain/Commander Alison Krennick (Andrea Thompson) was Rabb's direct superior.