In this episode Sheldon says that he can dance, and we see him dancing but in the episode "The Gothowitz Deviation" he says to Penny that he believes in parallel universes in which he is different in all of them, but that in none of them does he dance.
When Sheldon counts off all the times he's kissed, he left out the time Leonard's mother kissed him in "The Maternal Congruence"
Sheldon: (sees Priya with Leonard in the shower) What are you doing in there?! (to Leonard) She can't be in here!
Leonard: We're in here first. You can't be in here!
Sheldon: According to the Roommate Agreement--Paragraph 9, Sub-section B, the right to bathroom privacy is suspended in the event of force majeure. And believe me—I'm experiencing a very "majeure force"!
Sheldon: Memory impairment—the free prize at the bottom of every vodka bottle.
International Airdates: United Kingdom: August 25, 2011 on E4; Turkey: November 29, 2011 on CNBC-e; Czech Republic: December 8, 2011 on Prima COOL; Slovakia: December 19, 2011 on Markiza
This episode's end titles has Chuck Lorre's Vanity Card #341. It was used, in part, to explain that all the smoking from the monkey was not real and done with computerized effects.
Amy sings "I kissed a girl and I liked it..." These are the lyrics from Katy Perry's hit song, "I Kissed a Girl".
The code Sheldon uses for the self destruct sequence on his computer, 1-1A-2B, is the same used by Scotty to confirm the USS Enterprise's self destruct in Star Trek III: The Search for Spock.
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