The Big Bang Theory: The Bath Item Gift Hypothesis.
Leonard begins working with a physicist at the university and Penny begins to get attracted to him causing Leonard to get jealous. Sheldon ponders at what to get Penny for a Christmas present.
This had its laughs with the boys discussing Sluperman and Krypton right at the start and then a new person on campus comes in giving Leonard a reason to call himself a hypocrite and Sheldon showing a bit more emotion than normal after receiving a autograph from Leonard Nimoy. Season 2 Episode 11.
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