Matt Sigloch played Master Sergeant Tom Androvich, a Master Sergeant of the United Marine Corps, and used his own real-life experience as a Marine to make the show as convincing as possible. He also got to help the show behind-the-scenes as a technical adviser, drawing on his experience as a real-life badass.
Sigloch retired after 22 years of active duty service as a Master Sergeant. Since then he’s built a himself an acting career and even became a member of the Screen Actors Guild. He’s still acting, doing stunt work and even runs his own company called Sigloch Military-Tactical which helps films and shows with military-related themes.
Andrea Parker
Commander Caitlin Pike, otherwise known as “Kate”, was Harm’s first partner in the show. The two had a fling but nothing got too serious so they decided to break it off. In the story, Caitlin got reassigned to another station, but this actually happened because the real actress decided to leave the show to star in The Pretender.
Andrea Parker is a former ballet dancer but is known mostly for her TV roles on the ER, The Pretender, Desperate Housewives, and Pretty Little Liars. She also supports charities related to the research of various disabilities such as Parkinson's and autism.
Will Rothhaar
There’s nothing like a kid actor who ends up making it as a big-time, successful adult actor. Such is the case with Will Rothhaar, who starred in the role Josh Pen, the son of Annie Pendry and deceased Navy Lieutenant Lucas Pendry.
Will is the son of Michael and Nancy Rothhaar, both of whom are playwrights, actors, and directors. Rothhaar's performances include so many appearances on so many different crimes shows that it’s hard to keep track. His biggest movie role, for now, remains the leading role of Watts Davies in Kart Racer.
Tony Denison
On JAG, Commander Stefan Stefanopoulos was a Commander in the United States Navy, played by the talented Tony Denison. Now that’s a name that’s hard to forget.
Denison has since appeared in many other crime dramas including the roles of Aldo Burrows on Prison Break and Andy Flynn on The Closer and Major Crimes. He even received a Prism Award by the Entertainment Industry Council for Outstanding Performance in a Drama Series and five SAG nominations for Outstanding Performance by an Ensemble in a Drama Series.
Rex Linn
Rex Linn made his JAG debut in the season’s very first episode 'Shadow', playing the submarine skipper. He was later promoted by the production the play the role of Lt. Mark ‘Falcon’ Sokol.
He has since played in many other TV shows, including Lethal Weapon (as Nathan Riggs), Better Call Saul (as Kevin Wachtell) and most recently as Principal Petersen on Young Sheldon. Rex was also a celebrity award presenter at the National Association of Police Organizations in Washington DC.