(written from a Production point of view)
John Carrigan is an actor, martial artist, and stuntman who appeared as a command division officer in an early episode of Star Trek: The Next Generation.  As a background actor he received no credit for this appearance. More recently, he portrayed two different Klingons in the Star Trek fan film Star Trek: Of Gods and Men, directed by Tim Russ, and appeared in seven episodes of the fan-made series Star Trek: New Voyages (2004-2013), portraying Klingon Captain Kargh and other parts. On New Voyages, Carrigan performed alongside Trek actors James Cawley, Jeffery Quinn, Barbara Luna, William Windom, Malachi Throne (who played his father), Sam Witwer, Leslie Hoffman, Walter Koenig, Mary Linda Rapelye, Larry Nemecek, George Takei, Grace Lee Whitney, Majel Barrett Roddenberry, Denise Crosby, and Bill Blair. His wife Anne Carrigan appeared as a background character and worked as key costumer and production assistant on this series.
Born in Great Britain, Carrigan started studying martial arts in 1972 and also traveled to the United States to learn more about this discipline. While working as a security for several stars, including some of the cast from Star Trek: The Original Series, he met Gene Roddenberry, who inspired him to become an actor. He became a member of the Stunt Action Service, a stage stunt team and toured through the countries. He also studied at the Brian Sterling Stunt and Stage School and acting at The Actor's Center in London and Manchester. Today he is still working as a martial arts instructor and is holding several qualifications such as a Black Belt 3rd Dan in Shabumi Freestyle Karate and a Black Belt 1st Dan in Khan Do.
Among his feature film and television series performances are several independent films, British television series and specials, and Star Trek related appearances, including Blue Peter Star Trek Special as a Klingon, Watchdog as a Klingon, and as presenter in the QVC Star Trek Hour. Carrigan was also part of the cast of Star Trek: The Exhibition in London, Manchester, and Birmingham.
In 2003 he portrayed Marshall in the science fiction film Advanced Warriors, a movie on which he also worked as associate producer and special makeup effects artist and appeared along Chase Masterson. More recently he published his book, "The Other Side of Harry", an own life survival story.