
J.G. Hertzler
- Known for
- Acting
- Born
- March 18, 1949
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
- Axanar: The Gathering Storm
Axanar: The Gathering Storm 2026
as Admiral Sam Travis

The Circuit 2019
Actor

What We Left Behind: Looking Back at Star Trek: Deep Space Nine 2018
as Self

Prelude to Axanar 2014
as Admiral Samuel Travis

InAlienable 2008
as Dr. Lattis

40 Years of Star Trek 2006
as Self

Pirates of Silicon Valley 1999
as Ridley Scott

The Prophecy II 1998
as Father William

Star Trek: Deep Space Nine - The Way of the Warrior 1995
as Martok

Treasure Island: The Adventure Begins 1994
as Black Dog

...And Justice for All 1979
as Driver
Credits from TMDB.