J.G. Hertzler

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John Garman "J.G." Hertzler (born 18 March 1949; age 75) has portrayed many different roles on several Star Trek series. His best-known role is as Martok, who he played for four seasons in Star Trek: Deep Space Nine. Hertzler also wrote the continuation of his character's story in The Left Hand of Destiny novel duology (with Jeffrey Lang). He is one of only five actors to play seven or more different characters in the Star Trek franchise, the others being Jeffrey Combs, Randy Oglesby, Vaughn Armstrong and Thomas Kopache.

Hailing from Savannah, Georgia, USA, Hertzler began acting in the 1970s. One of his first major television roles was in the 1990 Quantum Leap episode "Sea Bride - June 3, 1954", where he appeared with Scott Bakula. Hertzler followed this with a recurring role on the series Zorro, starring Duncan Regehr and Henry Darrow, in which he appeared in 38 out of 87 episodes.

Other series which featured a Hertzler guest appearance include Seinfeld (with Jason Alexander), Lois & Clark (with Teri Hatcher), and Roswell (with William Sadler; episode written by Ronald D. Moore).

In 2007, it was announced that Hertzler would play Harry Mudd in a forthcoming edition of Star Trek: New Voyages, which he would also direct. Hertzler also appears in Star Trek: Of Gods and Men and Walter Koenig's movie, InAlienable.