J. G. Hertzler

John Garman Hertzler Jr. (born March 18, 1950) is an American actor, author, screenwriter, and activist best known for his role on Star Trek: Deep Space Nine as the Klingon General (later Chancellor) Martok, whom he portrayed from 1995 until the series' end in 1999.

Hertzler began his acting career in the 1970s, doing mostly stage acting and appearing in some films. He guest starred in a few episodes for different television shows before landing the part of Alcalde Ignacio De Soto in the early 1990s show Zorro. In addition to Deep Space Nine, Hertzler has appeared on several other Star Trek shows, written two Star Trek novels, and has made appearances at Star Trek and science fiction conventions. Hertzler lives in the Finger Lakes region of New York where he was a lecturer at Cornell University's theater department, and has been active in the area's regional politics, as well as writing a screenplay.