Sheldon and Spock

Wow, at last the two have finally met at the season 5 of Big bang theory.

Chuck Lorre, the genius behind the geek-hilarious comedy show along with Bill Prady, has quoted, “We’ve been chasing Leonard for years, and he finally gave up,” and “We caught him.”

Leonard Nimoy played the voice of Spock in Sheldon's dream sequence. He appeared in episode 20- the Transporter Malfunction.