In Star Trek V: The Final Frontier we learned that Spock had a half-brother. The fully Vulcan Sybok was played by actor Laurence Luckinbill who has revealed that things were a bit icy between him and Leonard Nimoy. Apparently Nimoy wanted to play both Spock and his brother. Details below.
Luckinbill: Nimoy Wanted To Play [...]
The popularity of Star Trek's Mr. Spock is 100% thanks to Leonard Nimoy. Nimoy made the role his own because he fully understood what it meant to play the alien — and seemingly emotionless — Vulcan character: Although he could often... Read Post
What would Star Trek V have been like if Leonard Nimoy had played both Spock and his misguided brother Sybok? Answer: Probably still pretty terrible, all other things being equal. More » Read Post