Raj’s parents set him up on a date and he thinks he’s found his soul-mate. Meanwhile, Penny buys Star Trek collectibles for Leonard and Sheldon, but Sheldon begins hearing Spock’s voice after he damages one of the items.

Recurring characters: Brian George as Dr. V. M. Koorthrappali and Alice Amter as Mrs. Koothrappalli
Guest stars: Chriselle Almeida as Lakshmi, Leonard Nimoy as Spock

Note: This is the first time that Leonard Nimoy has been cast in the series. The producers of the show have been trying for many years to get Nimoy, who has largely retired from on-camera acting, to appear on the show.

Air date: March 29, 2012

You can see photos here.