Worf is the first Klingon warrior to serve in Starfleet. Worf's biological father, Mogh, and mother were killed in 2346 at Khitomer in the Romulan attack. He was adopted by humans Helena and Sergei Rozhenko, a crew member of the U.S.S. Intrepid NCC-1831. He has a foster brother, Nikolai Rozhenko. He has a son Alexander Rozhenko, born in 2366, by K'Ehleyr (deceased). In 2368, his spinal column was shattered in an accident and he became paralyzed. He had genotronic replication, an experimental surgical procedure invented by Dr. Toby Russell. After destruction of the U.S.S. Enterprise NCC-1701-D at Veridian III Worf took extended personal leave at the Klingon monastery on the planet Boreth. He transferred to station Deep Space 9 in 2372 as Strategical Operations Officer during (unsuccessful) Klingon invasion of Cardassia. When Worf found living on the station uncomfortable, he moved into his quarters on the U.S.S. Defiant NX-74205. In 2373, Worf and Garak rescued Dr. Bashir and General Martok from a Dominion Internment Camp in the Gamma Quadrant; Worf proved his honor to Martok and became a member of the House of Martok. Worf married Lt. Commander Jadzia Dax in 2374. Worf enjoys Klingon history, Klingon martial arts and Klingon opera. While serving on the Enterprise-D, Guinan introduced him to his favorite beverage: prune juice, "a Warrior's Drink"

Starfleet History
2358-2361 Attended Starfleet Academy
2364 Posted to U.S.S. Enterprise NCC-1701-D, Lieutenant Junior Grade
2364 Assigned acting chief of security after death of Lieutenant Tasha Yar.
2365 Promoted to Chief Security and Tactical Officer, U.S.S. Enterprise NCC-1701-D
2366 Promoted to full Lieutenant.
2367 Resigned Commission during Klingon civil war. Reinstated.
2368 Spinal column shattered in an accident; had genotronic replication.
2369 Participated in a covert operation to Celtris III to destroy a Cardassian metagenic weapon. It was found to be a trap to capture Captain Picard.
2371 Promoted to Lieutenant Commander
2371 Took extended personal leave at monastery on planet Boreth after destruction of U.S.S. Enterprise NCC-1701-D at Veridian III.
2372 Transferred to Deep Space 9 as Strategical Operations Officer during (unsuccessful) Klingon invasion of Cardassia.
2372 While commanding the U.S.S. Defiant, destroys a civilian ship. A hearing is held to determine whether he should be extradited to the Klingon Empire. It is found that the ship was a decoy. There was no one on board.
2373 Garak and Lt. Cmdr. Worf travel to the Gamma Quadrant to search for Enabran Tain and are captured. They escape with Dr. Bashir and General Martok and return to DS9.
2373 Commanded the U.S.S. Defiant NX-74205 in Admiral Hayes' task force against the Borg invasion. Transferred to U.S.S. Enterprise NCC-1701-E when Defiant was damaged and lost life support, and served as tactical officer during the Borg's temporal incursion.
2374 Served on the I.K.C. Rotarran during Federation/Klingon Task Force against the Dominion.

Worf was first seen in "Encounter at Farpoint" (TNG).