J.G. Hertzler

Biography

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.

Known For

Seinfeld

Charmed

Lois & Clark: The New Adventures of Superman

Star Trek: Voyager

Star Trek: Deep Space Nine

All Movies (10)

The Circuit2019
What We Left Behind: Looking Back at Star Trek: Deep Space Nine2018 · as Self
InAlienable2008 · as Dr. Lattis
Star Trek: Of Gods and Men2007 · as Koval
40 Years of Star Trek2006 · as Self
Pirates of Silicon Valley1999 · as Ridley Scott
The Prophecy II1998 · as Father William
Star Trek: Deep Space Nine - The Way of the Warrior1995 · as Martok
Treasure Island: The Adventure Begins1994 · as Black Dog
...And Justice for All1979 · as Driver

All TV Shows (23)

A Captain's Log2021 · as Self
Star Trek: Lower Decks2020 · as Martok (voice)
Star Trek: Lower Decks2020 · as Drookmani Captain (voice)
Star Trek: Enterprise2001 · as Advocate Kolos
Star Trek: Enterprise2001 · as Klingon Captain
Six Feet Under2001 · as Gallery Owner
Roswell1999 · as Mr. Lafeber
Charmed1998 · as Council Member
Sabrina, the Teenage Witch1996 · as Plato
Everybody Loves Raymond1996 · as Everett Munce
Star Trek: Voyager1995 · as Hirogen Hunter
Diagnosis: Murder1993 · as Mr. Smith
Lois & Clark: The New Adventures of Superman1993 · as Trey
The Adventures of Brisco County, Jr.1993 · as Edward Hayes
Star Trek: Deep Space Nine1993 · as Martok
Star Trek: Deep Space Nine1993 · as Vulcan Captain
Star Trek: Deep Space Nine1993 · as Martok / Roy Ritterhouse
Star Trek: Deep Space Nine1993 · as Laas
Dr. Quinn, Medicine Woman1993 · as Capt. Burgoyne
Highlander: The Series1992 · as Marcus Korolus
Zorro1990 · as Alcalde Ignacio de Soto
Seinfeld1989 · as Director
Quantum Leap1989 · as Weathers Farrington