What actor has had the most guest starring / recurring roles on all the 'Star Trek' series?

BRY2K

I would argue that actress Majel Barrett has been the most prolific in the entire Star Trek franchise. Barrett became the first and only actor to participate in all six Star Trek TV series, as well as in both the TOS and TNG film series. Majel Barrett has been in every incarnation of the popular science fiction Star Trek franchise. She first appeared in Star Trek's initial pilot, "The Cage", as the USS Enterprise's unnamed First Officer, "Number One". Barrett is said to have been cast as Number One in part because of her romantic involvement with Roddenberry. Her role in subsequent episodes of Star Trek was altered to that of Nurse Christine Chapel. Barrett provided several voices for Star Trek: The Animated Series, including those of Nurse Chapel and the communications officer M'Ress, the felinoid (more properly ailuroid) Caitian who served alongside Uhura. Years later, she would return in Star Trek: The Next Generation, cast as the outrageously self-deterministic, iconoclast Betazoid Ambassador Lwaxana Troi. Barrett, as Troi, would also later appear in several episodes of Star Trek: Deep Space Nine. She also provided the regular voice of starship onboard computers for Star Trek: The Original Series, Star Trek: The Next Generation, Star Trek: Deep Space Nine, Star Trek: Voyager, and most of the Star Trek movies. She reprised her role as a shipboard computer voice in the two episodes of the prequel series Star Trek: Enterprise that involved an earlier time period – a century before the time of Kirk and Spock aboard the USS Enterprise NCC-1701. She has also lent her voice to various computer games and software related to the franchise. http://en.wikipedia.org/wiki/Majel_Barrett Jun 09 08, 4:30 PM

McGruff

After Barrett, I would go with Mark Lenard, best known as Spock's father, Sarek. Mark Lenard is one of the few actors ever to portray three different aliens on Star Trek: a Romulan, a Klingon and a Vulcan. In addition to having played all three (at the time) major aliens in the Star Trek universe - the Romulan commander in the original series "Balance of Terror", the Vulcan Sarek, and the Klingon captain in Star Trek: The Motion Picture (1979), he also almost played a human - Gene Roddenberry wanted him to portray Abraham Lincoln in "The Savage Curtain" (the episode where Kirk, Spock, Lincoln, and Vulcan legend Surak represent "good" in a staged battle with Genghis Khan and three others representing "evil"), but Lenard was unavailable at the time. In addition to appearing in several Star Trek shows and movies as Spock's father, Sarek, Lenard also played the very first Romulan ever seen and played the first Klingon to feature a "forehead" (the lumpy forehead prosthetics). Is one of only 32 actors or actresses to have starred in both the original "Star Trek" (1966) (up to and including Star Trek VI: The Undiscovered Country (1991) and then in one of the spin-offs. http://www.imdb.com/name/nm0501697/bio Jun 10 08, 12:01 AM

kleinfeld_ace

I once had a long night that I was really bored and researched this on my own. It was really fun, and perhaps someone can find more. Check these out: http://memory-alpha.org/en/wiki/Vaughn_Armstrong http://memory-alpha.org/en/wiki/Jeffrey_Combs http://memory-alpha.org/en/wiki/J.G._Hertzler http://memory-alpha.org/en/wiki/Patricia_Tallman http://memory-alpha.org/en/wiki/Thomas_Kopache http://memory-alpha.org/en/wiki/Randy_Oglesby http://memory-alpha.org/en/wiki/Marc_Alaimo http://memory-alpha.org/en/wiki/John_Fleck http://memory-alpha.org/en/wiki/Brian_Thompson http://memory-alpha.org/en/wiki/Phil_Morris http://memory-alpha.org/en/wiki/Suzie_Plakson http://memory-alpha.org/en/wiki/Carolyn_Seymour http://memory-alpha.org/en/wiki/James_Sloyan Thank you to memory alpha, of course... May 17 09, 7:34 PM