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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Howard uses a stick of some sort. Is it a game? Raj looks enthralled by it.
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TBBT Quotes

Howard: Attention people of Earth: Tonight, there will be two moons in the sky.

Sheldon: Why do you have the Chinese character for "soup" tattooed on your right buttock?
Penny: It's not "soup," it's "courage."
Sheldon: No it isn't. But I suppose it does take courage to demonstrate that kind of commitment to soup.
Penny: How'd you see it? You said you wouldn't look.
Sheldon: Sorry. As I told you, the hero always peeks.