The Big Bang Theory

Season 2 Episode 4

The Griffin Equivalency

23
Aired Thursday 8:00 PM Oct 13, 2008 on CBS

Trivia

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  • Allusions

    • Sheldon tries to smile but only manages an odd grimace. Leonard mentions that they are, "not out to kill Batman," comparing his smile to The Joker, who has a disfigured face that always smiles and is one of the main opponents of Batman in the comics and movies.

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