Star Trek premiered in 1966 and turned Nimoy into a legitimate star. Nimoy always stayed active as an actor, but his role as Spock on the television show and the Star Trek movies over the years dominated his reputation.
The actor – famous for playing Capt. Jean-Luc Picard on "Star Trek: The Next Generation" – officially became Sir Patrick Stewart when he was knighted by Queen Elizabeth II at Buckingham Palace. June The Queen used a Klingon sword.
Or just an illness that all starship captains are afflicted with causing them to talk dramatically in their heads seeing as Spock and Scotty also keep captains logs when they are temporarily in charge :P