actor J. G. Hertzler
Martok, son of Urthog is a recurring character in Star Trek: Deep Space Nine, played by actor J. G. Hertzler. Martok is a high-ranking Klingon leader at the Federation-Bajoran space station in the late 2300s.

While imprisoned, Martok was forced to fight his Jem’Hadar captors in hand-to-hand combat so they could familiarize themselves with Klingon fighting techniques. During one such fight, First Ikat’ika maimed Martok by destroying his left eye, resulting in partial blindness.

J. G. HertzlerStar Trek: Deep Space Nine
Laas/Played by

J. G. HertzlerStar Trek: Enterprise
Kolos/Played by

It was never stated in canon how the changeling managed this, but Joseph Sisko once suggested that a way a changeling could beat the blood test was to kill a random civilian on the street, absorb the man’s blood into itself and release it whenever it took part in a test. It is possible the Martok changeling did this.

The House of Mogh
The House of Mogh was one of the Great Houses of the Klingon Empire in the 23rd and 24th centuries. The House was last led by Worf, son of Mogh.

Lt. Ezri Dax points out to Worf that if men as honorable as himself tolerate corruption at the highest levels, there is no hope for the Klingon Empire. During a meeting in which Gowron presents another suicidal plan of attack, Worf calls out Gowron as dishonorable. By Klingon law, this makes Worf the new Chancellor.

J. G. Hertzler

Shannon Cochran
Sirella was originally voiced by different actress, but Shannon Cochran reprised the role in a 2020 update. In Articles of the Federation, Martok finds Praetor Tal’aura’s voice to be similar to Sirella’s, an in-joke by Keith R.A. DeCandido, as both characters were played by Shannon Cochran.

Background information. Kolos was played by Star Trek veteran J.G. Hertzler. It was the first Klingon character he played since Martok and his first named character since Laas, both of whom he played on Star Trek: Deep Space Nine.

Meanwhile, the real Martok was being held by the Jem’Hadar at Dominion Internment Camp 371 in the Gamma Quadrant, where he was forced to fight Jem’Hadar in hand-to-hand combat, which caused the loss of his left eye.

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