Mark had trouble wearing the armor his character Urko wore in the Planet Of The Apes tv series; it gave him a great deal of discomfort wearing both the make-up with the armor, which weighed up to 80 pounds depending on additions/accoutrements.
Mark was displeased with action figures made by Mego Corporation in 1974, with his likeness as gorilla General Urko from the Planet Of The Apes tv series.
Mark wrote an issue of Star Trek: Deep Space Nine for Malibu Comics in 1995, that featured his Trek character Sarek, the issue being under Malibu's "Celebrity Series" line.
Mark met his wife, Ann Amouri, in acting class.
Mark narrated the audio-book version of the novel about his Star Trek character, Sarek (1994).
Mark wore glasses when off-camera, as he was far-sighted.
Mark was 6 feet tall.
One of Mark's favorite fan convention stories was about how he was recognized as the ape general Urko from the Planet Of The Apes TV series by a fan on the street--except he wasn't wearing his ape makeup at the time.
Mark was the first actor to play all 3 major alien races on Star Trek, as a Romulan, Vulcan, and a Klingon.
You can share a link to this page with your friend!