Penny buys Leonard and Sheldon “Star Trek” collectibles as a thank-you, leading Sheldon to be haunted by Mr. Spock. Meanwhile, Raj decides he has met the “Future Mrs. Koothrappali” after his parents set him up on a date.
Leonard Nimoy as Spock; 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
Chriselle Almeida as Lakshmi
Brian George as Dr. Koothrappali
Alice Amter as Mrs. Koothrappli
Air Date: March 29, 2012