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Raj and Emily go out on a double date with Howard and Bernadette.
Sheldon can't decide which gaming system to buy at the store. Read on for a full recap.
Howard and Sheldon visit Sheldon's mom on their trip to NASA but she ends up surprising them instead on The Big Bang Theory.
Wolowitz invites Sheldon on a trip to Houston. When it doesn't go well, Bernadette tries to bring them back together.
When Leonard buys a dining room table, Sheldon begins to analyze the recent changes in his life on The Big Bang Theory.
Amy, Sheldon, Howard and Bernadette plan a trip to the wine country together on The Big Bang Theory.
When Sheldon can't get in to Comic Con, he decides to devise his own comic book convention on The Big Bang Theory.
Penny gets a big break at a full time acting job while Sheldon is forced to take time off on The Big Bang Theory.
When Penny's acting debut doesn't go as she hoped, she ends up asking Leonard an serious question about their relationship on The Big Bang Theory.
With Sheldon away, each of them wonders what their lives would be like if they'd never met him on The Big Bang Theory.