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The Big Bang TheoryS02E20

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The Big Bang Theory : The Hofstadter Isotope

S02, E20 ()

Wolowitz and Leonard decide to check out a local bar on Ladies' Night.

TV-PG (D,L,S)

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Previous Episode

The Dead Hooker Juxtaposition

S02, E19 (First Aired: March 30, 2009)

Penny develops a rivalry with a sexy new female neighbor who threatens her position as queen bee of the building.

Next Episode

The Vegas Renormalization

S02, E21 (First Aired: April 27, 2009)

Koothrappali and Leonard take Wolowitz to Las Vegas; Sheldon is forced to bunk with Penny when he gets locked out of his apartment.

See all episodes