John Garman "J. G." Hertzler Jr. (born March 18, 1950) is an American actor, author, screenwriter, and activist best known for his role on "" as the Klingon General (and later Chancellor) Martok, whom he portrayed from 1995 until the series' end in 1999.
John Garman "J. G." Hertzler Jr. was born before World War II.