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J.G. Hertzler
John Garman Hertzler Jr. (born March 18, 1950, in Savannah, Georgia) is an American actor, author, screenwriter, and activist best known for his role as the Klingon General (later…
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John Garman Hertzler Jr. (born March 18, 1950, in Savannah, Georgia) is an American actor, author, screenwriter, and activist best known for his role as the Klingon General (later Chancellor) Martok on Star Trek: Deep Space Nine, a role he played from 1995 until the series ended in 1999. Hertzler began his acting career in the 1970s, primarily in stage acting and some films, eventually guest-starring in TV shows before landing a major role in the 1990s series Zorro as Alcalde Ignacio De Soto. Beyond Deep Space Nine, he appeared in several other Star Trek shows, wrote two Star Trek novels, and frequently appeared at science fiction conventions. He grew up mostly around Washington, D.C., attended Bucknell University (earning a degree in political science), pursued a master's in set design at the University of Maryland, and even attended law school briefly. His early career included theater in Washington, New York, San Francisco, and Southern California, with roles spanning Shakespeare and other dramatic works, as well as some film appearances. Hertzler lives in the Finger Lakes region of New York, where he has lectured at Cornell University’s theater department and has been active in local politics and writing screenplays. His filmography includes notable appearances outside of Star Trek, such as Quantum Leap, Zorro, Highlander, and others.
Filmography
Movies and shows, newest first
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2026
Axanar: The Gathering Storm
Movie Admiral Sam Travis
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2021
A Captain's Log
TV show Self
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2020
Star Trek: Lower Decks
TV show Martok (voice)
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2019
The Circuit
Movie
- 2018
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2014
Prelude to Axanar
Movie Admiral Samuel Travis
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2008
InAlienable
Movie Dr. Lattis
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2006
40 Years of Star Trek
Movie Self
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2001
Star Trek: Enterprise
TV show Advocate Kolos
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2001
Six Feet Under
TV show Gallery Owner
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1999
Roswell
TV show Mr. Lafeber
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1999
Pirates of Silicon Valley
Movie Ridley Scott
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1998
Charmed
TV show Council Member
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1998
The Prophecy II
Movie Father William
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1996
Sabrina, the Teenage Witch
TV show Plato
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1996
Everybody Loves Raymond
TV show Everett Munce
More credits
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1995
Star Trek: Deep Space Nine - The Way of the Warrior
Movie Martok
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1995
Star Trek: Voyager
TV show Hirogen Hunter
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1994
Treasure Island: The Adventure Begins
Movie Black Dog
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1993
Diagnosis: Murder
TV show Mr. Smith
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1993
Lois & Clark: The New Adventures of Superman
TV show Trey
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1993
The Adventures of Brisco County, Jr.
TV show Edward Hayes
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1993
Star Trek: Deep Space Nine
TV show Martok
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1993
Dr. Quinn, Medicine Woman
TV show Capt. Burgoyne
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1992
Highlander: The Series
TV show Marcus Korolus
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1990
Zorro
TV show Alcalde Ignacio de Soto
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1989
Seinfeld
TV show Director
-
1989
Quantum Leap
TV show Weathers Farrington
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1979
...And Justice for All
Movie Driver
