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Yes, in the episode called "The Lunar Excitaion" (http://bigbangtheory.wikia.com/wiki/The_Lunar_Excitation http://bigbangtheory.wikia.com/wiki/The_Lunar_Excitat

by unwind 13y ago

Yes, in the episode called "The Lunar Excitaion" (http://bigbangtheory.wikia.com/wiki/The_Lunar_Excitation http://bigbangtheory.wikia.com/wiki/The_Lunar_Excitation), it's Season 3, Episode 23, aired first on May 24 2010.