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Mark Lenard was an actor, perhaps best known for his many roles in the Star Trek universe. Lenard played a Klingon, a Romulan, and a Vulcan in the original '60s Star Trek TV show, and memorably played Sarek, Spock's Vulcan father, in several Star Trek movies and later TV shows.
Filmography
Star Trek VI: The Undiscovered Country (1991)
as Sarek
Star Trek IV: The Voyage Home (1986)
as Sarek
Star Trek III: The Search for Spock (1984)
as Ambassador Sarek
Star Trek: The Motion Picture (1979)
as Klingon Captain
Hang 'em High (1968)
as Prosecutor