The first Klingon warrior to serve in the Federation Starfleet and an influential figure in Klingon politics.
Worf, son of Mogh, was born on the Klingon Homeworld in 2340. As a young child, Worf accompanied his parents to the Khitomer Outpost in 2346.
Worf was orphaned later that year in the brutal Khitomer Massacre, a Romulan attack in which 4,000 Klingons were killed. Worf was rescued by Sergey Rozhenko, a human crew member from the U.S.S. Intrepid. Sergey and his wife, Helena Rozhenko, adopted Worf and raise him as thier own son, because it was believed that Worf had no remaining family on the Homeworld.
With his new family on the farm world of Gault and later Earth, Worf found it difficult to fit into the alien world of Humans and was a bit of a hell-raiser. Worf was raised along with an adopted brother, Nikolai Rozhenko, the biological son of the Rozhenkos. Nikolai entered Starfleet Academy at the same time as Worf, but later dropped out because he found Starfleet not to his liking.
Worf's hobbies include the building of ancient Klingon ocean sailing vessels in a bottle, considered difficult handiwork.
Worf's adoptive parents remained close to him over the years, and made it a point to visit him in early 2367 when the Enterprise-D was docked at Earth Station McKinley for repairs.
Worf had a son, Alexander Rozhenko, in 2367, with Ambassador K'Ehleyr, with whom he had been romantically involved. When K'Ehleyr was murdered by Klingon high ouncil member Duras, Alexander returned to Earth to be cared for by Sergey and Helena.
For some reason, Worf's experiences on Earth never included drinking prune juice. When given a taste of it by Guinan in 2365, Worf pronounced it "a warrior's drink."
Following his graduation from Starfleet Academy in 2361, Worf held the rank of Lieutenant,Junior Grade, and served as flight controller aboard the U.S.S. Enterprise-D.
Worf was promoted to acting chief of security and made a full lieutenant following the death of Lieutenant Natasha Yar at planet Vagra II in late 2364. Worf felt intense guilt when Lieutenant Marla Aster was accidently killed on an away mission in 2366, orphaning her son Jeremy Aster. Worf later took Jeremy into his family through the Klingon R'uustai, or bonding, ceremony.
In 2368, Worf's spinal column was shattered in an accident when several cargo containers collapsed on him. Worf was left paralyzed, and his prognosis indicated little hope for a full recovery. In accordance with Klingon tradition, Worf refused medical treatment and opted for the Hegh'bat a form of ritual suicide. He was dissuaded from taking his life when Dr. Toby Russell performed a dangerous experimental surgical procedure called genetronic replication, in which a new spinal column was generated to replace the damaged organ. The surgery was successful, in part because Klingon physiology includes redundancy for nearly all vital bodily functions.
Worf once investigated a claim that his father had not died at Khitomer, but was instead held prisoner at a secret Romulan prison camp in the Carraya System. Although the report was false, Worf did indeed find a prison camp where survivors of the Khitomer massacre and their families were being held. At the camp Worf fell in love with a half-Romulan, half-Klingon woman named Ba'el. Worf led some of the prisoners to freedom, but the majority (including Ba'el) choose to remain, regarding the Carraya prison as their home.Worf and the freed prisoners all promised never to reveal the story of the prison camp at Carraya, so we assume Starfleet has no knowledge of it.
Worf was thrust into high-level Klingon politicsin 2366 when he discovered that he had a biological brother, Kurn. The Klingon High Council had ruled that their father, Mogh, had committed treason at Khitomer. Worf and Kurn challenged this judgement but found the High Council unwilling to hear evidence taht the politically powerful Duras family had falsified the charges against Mogh. Although Worf was willing to die in the challenge to protect his family honor, he eventually choose to accept a humiliating discommendation rather than allow his brother to be killed. Worf later killed Duras for having murdered K'Ehleyr.
Worf was once again dragged into high-level Klingon politics in late 2367 and early 2368 when a challenge to the Gowron regime by the Duras family triggered a Klingon civil war. Worf and Kurn agreed to support the Gowron regime in exchange for the rightful restoration of honor to the Mogh family. During the conflict, Worf was forced to resign his Starfleet commission because he would not otherwise be permitted to take sides in that internal political matter.
In 2369, Worf experienced a crisis of faith, and requested a leave of absence to visit the Klingon monastery on Boreth. While meditating to invoke visions of Kahless the Unforgettable, Worf met a very real vision of Kahless. It was discovered that this Kahless was in fact a clone of the original, created by the clerics of Boreth. At Worf's suggestion, and with the support of High Council leader Gowron, the new Kahless was installed as the ceremonial Emperor of the Klingon people in 2369.