Played by: J.G. Hertzler
Full name: Martok
Position/occupation: Military commander in the Klingon Defense Force
Rank/title: General (became Chancellor at the end)
Birthplace or childhood home: Ketha lowlands on Qo'Nos
Parents: father died before Martok became an officer
Spouse: Lady Sirella
Children: son Drex; at least one other child
A Klingon officer who had come from a humble house of soldiers, in the Ketha province, but rose to become a general, a top aide to Gowron, and eventually Chancellor himself.
As a youth, he applied to the Klingon officers' academy, but his admission was denied by the council because Kor, a council member, believed his house was not noble enough. Martok was unable to join the military even as a common soldier. For five years, he was a civilian laborer on General Shivang's flagship, until earning a battlefield commission during a Romulan attack. His father did not live to see this, and Martok hated Kor for years as a result.
In 2371, Martok was hunting saberbear on Kang's Summit when he was taken prisoner by the Dominion and replaced by a Changeling. He was found in a Dominion prison by Worf and Garak (in "In Purgatory's Shadow"/"By Inferno's Light"), having lost his left eye in a fight with Ikat'ika. After he escaped with the other prisoners, Sisko appointed him to command the Klingon military attachment to DS9.
Not long afterwards, in "Soldiers of the Empire", Martok commanded the Rotarran on a mission to locate the B'Moth, but his excessive caution nearly caused a mutiny until Worf challenged him. Martok won, but was reminded of his duty and rescued the crew of the B'Moth, after which he adopted Worf into his house as his brother. He also later adopted Worf's son Alexander ("Sons and Daughters").
During the Federation/Dominion war, Martok proved invaluable to the Alpha Quadrant forces, and after the retaking of DS9, was made Supreme Commander of the 9th Fleet, on Sisko's recommendation ("You Are Cordially Invited"). Finally, though, when Gowron came to the station to give him the Order of Kahless, the Chancellor also assumed direct command of the Klingon forces ("When It Rains..."). He began ordering Martok on one impossible mission after another. This was because Gowron felt politically threatened by Martok, and wanted to undermine him. In the end, when Martok would not challenge Gowron, Worf did so instead, and killed him. He then placed the Chancellor's robe of office on Martok's shoulders, and Martok accepted ("Tacking Into the Wind").
After Chancellor Martok participated in the final victorious offensive against the Dominion, he got Worf assigned as Federation ambassador to Qo'Nos ("What You Leave Behind").
Appearances: "In Purgatory's Shadow", "By Inferno's Light", "Soldiers of the Empire", "Blaze of Glory", "Call to Arms", "A Time to Stand", "Sons and Daughters", "Favor the Bold", "Sacrifice of Angels", "You Are Cordially Invited", "Tears of the Prophets", "Image in the Sand", "Shadows and Symbols", "Treachery, Faith and the Great River", "Once More Unto the Breach", "The Emperor's New Cloak", "Strange Bedfellows", "The Changing Face of Evil", "When It Rains...", "Tacking Into the Wind", "The Dogs of War", "What You Leave Behind"