4x24 The Roommate Transmogrification
First Aired: May. 19, 2011 on CBS
Summary: When Bernadette receives her PhD, the guys take joy in reminding an emasculated Wolowitz that he is the only one in their group who isn't a doctor; Raj becomes Sheldon's new roommate after hearing Leonard and Priya engaging in a "Star Trek" fantasy in his bedroom.
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Guest Stars[no credits found]