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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

7.5

Self

A Captain's Log

2021

7.6

Martok (voice)

Star Trek: Lower Decks

2020

7.6

Drookmani Captain (voice)

Star Trek: Lower Decks

2020

1.0

The Circuit

2019

7.0

Self

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

2018

6.8

Captain Samuel Travis

Prelude to Axanar

2014

4.2

Koval

Star Trek: Of Gods and Men

2007

4.3

Self

40 Years of Star Trek

2006

7.5

Advocate Kolos

Star Trek: Enterprise

2001

7.5

Klingon Captain

Star Trek: Enterprise

2001

Credits

A Captain's Log

as Self

2021

7.5

Star Trek: Lower Decks

as Martok (voice)

2020

7.6

Star Trek: Lower Decks

as Drookmani Captain (voice)

2020

7.6

The Circuit

2019

1.0

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

as Self

2018

7.0

Prelude to Axanar

as Captain Samuel Travis

2014

6.8

Star Trek: Of Gods and Men

as Koval

2007

4.2

40 Years of Star Trek

as Self

2006

4.3

Star Trek: Enterprise

as Advocate Kolos

2001

7.5

Star Trek: Enterprise

as Klingon Captain

2001

7.5

Six Feet Under

as Gallery Owner

2001

8.1

Roswell

as Mr. Lafeber

1999

7.7

Pirates of Silicon Valley

as Ridley Scott

1999

7.0

Charmed

as Council Member

1998

8.2

The Prophecy II

as Father William

1998

6.0

Sabrina, the Teenage Witch

as Plato

1996

7.8

Everybody Loves Raymond

as Everett Munce

1996

6.8

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

as Martok

1995

5.5

Star Trek: Voyager

as Hirogen Hunter

1995

7.8

Treasure Island: The Adventure Begins

as Black Dog

1994

9.0

Diagnosis: Murder

as Mr. Smith

1993

7.1

Lois & Clark: The New Adventures of Superman

as Trey

1993

6.9

The Adventures of Brisco County, Jr.

as Edward Hayes

1993

7.0

Star Trek: Deep Space Nine

as Martok

1993

7.9

Star Trek: Deep Space Nine

as Vulcan Captain

1993

7.9

Star Trek: Deep Space Nine

as Martok / Roy Ritterhouse

1993

7.9

Star Trek: Deep Space Nine

as Laas

1993

7.9

Dr. Quinn, Medicine Woman

as Capt. Burgoyne

1993

7.6

Highlander: The Series

as Marcus Korolus

1992

7.4

Zorro

as Alcalde Ignacio de Soto

1990

7.1

Seinfeld

as Director

1989

8.3

Quantum Leap

as Weathers Farrington

1989

8.0

...And Justice for All

as Driver

1979

7.1