Leonard Nimoy tweeted this set photo from The Big Bang Theory, showing the first-ever meeting of Mr. Spock and Star Trek uberfan Dr. Sheldon Cooper (Jim Parsons).
After five years of trying to land Nimoy as a guest star, Big Bang Theory co-creator Chuck Lorre says, "He finally gave up. We caught him."
Nimoy will haunt Sheldon's dreams in an episode entitled