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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. Pictured (left to right): Kunal Nayyar, Jim Parsons, Johnny Galecki, Simon Helberg. Photo: Monty Brinton/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved