Goof: In this episode Amy seems totally willing to dress up in a costume but in Season 4 Episode 11 The Justice League Recombination Sheldon says, "Amy doesn't believe in wearing costumes. She isn't the free spirit I am." Now granted maybe she feels different about Halloween as she does about New Years Eve but Sheldon didn't say that.
Amy: There are certain things that say to the world "I have a boyfriend and he's not made up." Matching costumes, hickeys, and sex tapes. Pick one.
Sheldon: What's a hickey?
This episode's end titles have Chuck Lorre's Vanity Card #396.
Original International Air Dates:
Canada: October 25, 2012 on CTV
United Kingdom: December 13, 2012 on E4/E4 HD
Finland: December 5, 2013 on Sub
On the Venn Diagram listing potential couple costumes, under costumes preferred by Amy Farrah Fowler is the couple "Dharma & Greg". "Dharma & Greg" was the first series created by executive producer Chuck Lorre.
On the Venn Diagram listing potential couple costumes, under costumes preferred by Amy Farrah Fowler is the couple "Blossom & Joey". The actress Mayim Bialik played Blossom in the original series.