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| 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. |
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| When Howard finally breaks the news to his mom that he's engaged to Bernadette, it lands her in the hospital. |
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| Raj attempts to cure his social anxiety disorder while Penny uses Bernadette to spy on Leonard and his girlfriend. |
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| When Priya uses her lawyer skills to pick apart the roommate agreement, the girls take Sheldon dancing. |
