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Portrayed by: Michael Dorn

Worf, Son of Mogh


Qo'noS, later
Earth (Belarus)

United Federation of Planets
Klingon Empire
House of Martok
House of Mogh

Tactical officer and Chief of security,
USS Enterprise-D
USS Enterprise-E;
Strategic operations officer and USS Defiant First Officer,
Deep Space 9

Lieutenant J.G. (TNG Seasons 1-2)
Lieutenant (TNG Seasons 3-7)
Lieutenant Commander (Feature films and DS9)

Ambassador to the Klingon Empire1 (DS9 & Beyond)

Requested by then-General Martok, who became chancellor when Worf declined the position.

Portrayed by Michael Dorn



Worf was at first not intended to be a regular character, since Gene Roddenberry wanted to avoid "retreads of characters or races featured prominently in the original Star Trek series", and so the June 1, 1987 cast portrait did not include Worf.

Several "tall, slim, black actors" auditioned for Worf before Michael Dorn came along, walking into the audition in character and not smiling (Indeed, Michael Dorn found the seriousness of the role, especially during the audition, at first to be uncomfortable, since he considers himself a comedian at heart).

Dorn is the only Star Trek actor to have worked concurrently on the Next Generation films and the Deep Space Nine series, both of which are set in the same time period. There are scenes in First Contact and Insurrection to explain his absence from Deep Space 9 and reunion with Captain Jean-Luc Picard's officers. In First Contact Worf is initially commanding USS Defiant before he is beamed aboard the Enterprise, while in Insurrection Picard jokes that Worf was late for his bridge shift due to being accustomed to life aboard Deep Space 9.


The House of Mogh was a family of high social and political rank which was for a time represented on the Klingon High Council. In Star Trek VI: The Undiscovered Country, Worf's grandfather Colonel Worf (also portrayed by Michael Dorn) appears in a role as the legal advocate of Captain James T. Kirk and Dr. Leonard McCoy after they are accused of killing Chancellor Gorkon of the Klingon High Council. He was also a member of the Klingon delegation at Camp Khitomer. Although not explicitly stated, he was intended to be Worf's grandfather.


Worf was born in 2340 on the Klingon homeworld as the son of Mogh. Five years later, his parents moved to the Khitomer colony. Worf's parents were killed during a surprise attack by the Romulans on the Khitomer outpost. The colony's distress call was answered by the Federation starship USS Intrepid. Chief Petty Officer Sergey Rozhenko found Worf in the rubble and took him in after failing to find any living relatives. Rozhenko and his wife Helena raised him on a small farm colony on the planet Gault, a world of about 20,000 inhabitants, almost all of them human. Worf also has a human brother, Nikolai, through his adoption by the Rozhenkos, with whom he often quarreled. He also spent time in his parents' native Minsk, later recommending it to O'Brien as one of his favorite places on Earth.

Worf did not take the Rozhenkos' last name, preferring to be addressed by the Klingon designation "Worf, son of Mogh". However, his son Alexander Rozhenko, who was raised by the Rozhenkos after his mother K'Ehleyr died, did use their surname. Although Worf was raised by humans, he considered himself a Klingon at heart and studied the ways of his people. As an adult, his mannerisms and personality, as well as his innate sense of honor, became more Klingon than human.

Worf's brother Kurn, barely a year old at the time of the Khitomer attack, had been left behind on the Klingon homeworld Qo'noS by his parents. Lorgh, a friend to House of Mogh (appearing only in dialog of the episode "Sins of the Father"), was charged with the care of the younger son, originally expecting Mogh's stay at the Khitomer outpost to be short-term. Lorgh adopted Kurn after the attack, but informed Klingon authorities that he had died with the rest of the family. Kurn was not revealed as being alive until both brothers were adults.

In 2357, Worf entered Starfleet Academy. He graduated in 2361 and was commissioned with the rank of Ensign, becoming the first Klingon officer in Starfleet. Although Worf took immense pride and a sense of honor from serving in Starfleet, most other Klingons shunned and belittled his choice of vocation.

In 2359, he became briefly involved with K'Ehleyr who was the daughter of a Klingon father and a human mother.


In 2364 Worf was assigned to the USS Enterprise-D as relief flight control and tactical officer with the rank of lieutenant junior grade (TNG: "Encounter at Farpoint"). The next year he was made Acting Chief of Security following the death of Natasha Yar, even though he believed that a promotion due to the death of a comrade was not honorable (TNG: "Skin of Evil"). The next year he transferred to operations division and was formally made Chief of Security (TNG: "The Child").

In 2365, he renewed his relationship with K'Ehleyr when she came aboard the Enterprise as a Federation emissary on an urgent mission. He proposed marriage but was rejected (TNG: "The Emissary").

In 2366, he was promoted to lieutenant (TNG: "Evolution"). After an accident caused the death of Lt. Marla Astor, Worf brought the orphaned Jeremy Astor into the House of Mogh through the rite of R'uustai (TNG: "The Bonding").

Worf learned of Kurn's existence when Kurn was assigned to the Enterprise as an Exchange Officer. Kurn specifically asked for the Enterprise so he could observe his brother. He then revealed his true identity, informing Worf that Duras accused their father of betraying the Klingon Empire by helping the Romulans attack Khitomer. When they and the Enterprise crew discovered that it was in fact Duras' father that betrayed the Empire, Worf, realizing that the powerful House of Duras could not be publicly shamed without throwing the Empire into civil war, accepted a ritual discommendation from the Klingon High Council. While Worf decided to accept this dishonor, it was decided to keep Kurn's true identity secret in order to protect his honor (TNG: "Sins of the Father").

In 2367, K'Ehleyr returned with Klingon Chancellor K'mpec who had come to meet with Capt. Picard. When she came aboard, Worf learned he had a son named Alexander. She wanted to marry him but Worf refused because he did not want to share his dishonor with her and their son (TNG: "Reunion").

After K'mpec's death, she assisted Capt. Picard with the rite of succession. K'Ehleyr was eventually murdered by Duras when she found evidence of his involvement in the effort to discredit Worf. Exercising his right of vengeance, Worf fought and killed Duras allowing Duras's opponent Gowron to become chancellor (TNG: "Reunion").

A civil war erupted when the Duras' son challenged Gowron. Worf believed Gowron was the legitimate ruler and convinced his brother to bring forces loyal to him into battle on Gowron's behalf. Worf resigned from Starfleet to fight for Gowron and served on his brother's ship. Gowron won the war after Starfleet exposed Romulan support for the House of Duras. In appreciation of his support, Chancellor Gowron restored Worf's honor (TNG: "Redemption, Part I") and gave Kurn a seat on the High Council. Worf later regained his Starfleet commission (TNG: "Redemption, Part II").

In 2369 while the Enterprise was at Deep Space Nine, Worf investigated a claim that his father might still be alive in a Romulan prison camp. His father was not there but a number of Klingons were living there with the Romulans. Unable to return home with honor, as Klingons are supposed to commit suicide rather than be taken prisoner, they stayed and strayed from their way of life. Worf's visit had a profound effect on the children of the prisoners and many chose to leave with him (TNG: Birthright).

Worf's visit to the camp caused him to reconsider his own beliefs. He visited the monastery at Boreth to meditate. One day, a man appeared before him claiming to be Kahless the Unforgettable who had returned to lead the Empire once more. Worf was willing to consider the idea that Kahless was genuine because he believed the Klingons had lost their ways. Gowron was skeptical. He questioned Kahless about details of his memories, which Kahless could not recall, and then challenged Kahless to combat, defeating him easily. The loss forced the clerics to reveal that they had created a clone of Kahless and implanted ancient scriptures of Kahless' battles as his memories. Despite this, Worf became convinced that the Klingons would make a leap of faith and accept him as the legitimate heir of Kahless. He convinced the Klingons to appoint the new Kahless as Emperor. While real power remained with Gowron as head of government, the Emperor would be the formal head of state and teach the stories of Kahless. (TNG: "Rightful Heir").

Worf avoided romantic attachments with non-Klingons during his first few years on board the Enterprise-D. As Worf explained to both Riker and Guinan, he felt that non-Klingon females would be too fragile, and that he would have to restrain himself too much. He eventually developed strong feelings for Counselor Deanna Troi, and explored a relationship with her for a time, which at times strained his relationship with her former romantic interest, Commander Riker. Worf and Troi ended their relationship following the destruction of the Enterprise-D at Veridian III and Worf's reassignment to Deep Space Nine.


In 2371 he was promoted to lieutenant commander (Star Trek Generations). After the destruction of the Enterprise-D, Worf took an extended leave to evaluate his future. He was at a monastery on the Klingon colony of Boreth when he was ordered to go to Deep Space 9 to advise Captain Sisko when a Klingon fleet massed at the station. When he arrived, he is met by former Enterprise-D crew member and DS9's Chief of Operations, Miles O'Brien. (DS9: "The Way of the Warrior").

Worf learned that the Klingons were planning to invade Cardassia because of a coup which they had been led to ...

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