When Howard and Raj are testing the kissing devices, Howard complains and says Raj bit his tongue; the device only has a tongue and lips, not teeth.
Sheldon: If we were an old married couple, the wife would serve iced tea and snickerdoodles.
Penny: I don't have iced tea and snickerdoodles.
Sheldon: A good wife would go to the store.
International Airdates: Australia: October 10, 2011 on Channel 9; United Kingdom: November 10, 2011 on E4; Czech Republic: June 19, 2012 on Prima COOL; Turkey: September 11, 2012 on CNBC-e; Finland: January 14, 2013 on Sub
This episode's end titles has Chuck Lorre's Vanity Card #350.
This episode aired at a special 8:30 time, immediately after the season premiere.