3. Mark Lenard
Mark Lenard is Sarek the father of Spock. We say that Lenard is Sarek because even though he was a guest star he owned the role and truly made it his own. It’s had for a guest star to make a lasting impression on a franchise as large and expansive as Star Trek, but Mark Lenard managed to do it with his portrayal of Sarek.
Lenard’s Sarek appeared in Star Trek: The Original Series, Star Trek: The Next Generation, Star Trek: The Animated Series, and in three of the Star Trek movies.
It wasn’t just Sarek that Mark Lenard was known for in Star Trek; Lenard’s Romulan Commander in Star Trek: The Original Series is the first Romulan we see with Vulcan ears. So Lenard wasn’t the first Romulan, but he was the Romulan that revealed their relation to the Vulcans.
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