Bernadette and Howard go on a double date with Raj and Emily.
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Howard has a good time hanging out with Sheldon at the bar.
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Sheldon and Howard hang out at the bar in Houston.
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While in Houston, Howard and Sheldon hang out together.
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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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Howard is offered the opportunity to go back into space on "The Table Polarization."
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What is this stick? Both Howard and Raj look ecstatic about it on "The Table Polarization."
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TBBT Quotes

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

Leonard: Hi. I'm Leonard. You are beautiful. You pop, sparkle and buzz electric. I'm going to pick you up at eight, show you a night you will never forget.
Raj: Where are we going?