Michael Dorn
Michael Dorn

Michael Dorn played Klingon Worf, initially appearing as a junior officer fulfilling several roles on the bridge. When Denise Crosby (Lieutenant Yar) left at the end of the first season, he succeeded her as the ship’s chief of security and tactical officer.

Dorn reprised the role as a regular in seasons 4-7 of Star Trek: Deep Space Nine and also played another Klingon, also named Worf) in 1991’s movie “Star Trek VI: The Undiscovered Country.”

Dorn has made 282 on screen appearances, the most of any actor in the Star Trek franchise.