When Bernadette receives her Ph.D., the guys take joy in reminding an emasculated Wolowitz that he is the only one in their group who isn't a doctor. Meanwhile, Koothrappali becomes Sheldon's new roommate after hearing Leonard and Priya engaging in a "Star Trek" bedroom fantasy.
When Bernadette receives her Ph.D., the guys take joy in reminding an emasculated Wolowitz that he is the only one in their group who isn't a doctor. Meanwhile, Koothrappali becomes Sheldon's new roommate after hearing Leonard and Priya engaging in a "Star Trek" bedroom fantasy.
Guest Cast
![Carol Ann Susi](https://static.tvmaze.com/uploads/images/medium_portrait/4/10334.jpg)
Carol Ann Susi
voices Mrs. Wolowitz![Priya](https://static.tvmaze.com/uploads/images/medium_portrait/3/8233.jpg)
Aarti Mann
as PriyaCast Appearances
![Penny](https://static.tvmaze.com/uploads/images/medium_portrait/175/439563.jpg)
Kaley Cuoco
as PennyEpisode Discussion
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