Sheldon and Howard hang out at the bar in Houston.
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Sheldon has a difficult time with the news that she shares with him.
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Sheldon's mother talks to her son while he visits her in Houston.
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While in Houston, Howard and Sheldon hang out together.
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Howard helps Sheldon accept the new reality at his home.
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Sheldon visits his mother while he's in Houston. He's forced to accept new circumstances.
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Raj's murder mystery game isn't quite the killer party he's hoped for on The Big Bang Theory.
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Raj hands Howard something during the game night with Sheldon and Leonard.
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Howard smiles during a visit to see Sheldon at his University office.
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Sheldon's listens to Howard while at work behind his computer.
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Penny surprises both Leonard and Sheldon with her comment.
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Penny and Leonard chat in front of the still-broken elevator.
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TBBT Quotes

Penny: Here's a question-- as an alien pretending to be human, are you planning to engage in any post-prom mating rituals with Amy?
Sheldon: There are post-prom mating rituals?
Penny: Not always. Unless your date drives a van with an air mattress, then always.
Sheldon: Well, if it's part of the prom experience, then I'm open to it.
Penny: You're kidding.
Sheldon: I may be an alien, but I have urges.If Amy wants to copulate by firing her eggs into space, well, then, I will happily catch them with the reproductive sac on my upper flermin. I'm not the best at reading facial cues, but I can see that you're a little turned on.

Penny, there's only one cookie with something in the middle that solves life's problems, and that's an Oreo. Or a Nutter Butter, if you're in a pinch.

Sheldon