Trivia: In this episode, Sheldon and Amy are trying to decide on couples' themed Halloween costumes. Sheldon is standing in front of the dry erase board. There are 2 columns written on the board. One named "Couples I Like" and the other "Couples You Like." Under the "Couples You Like" column, one of the couples is Blossom and Joey. Blossom is the name of the television character played by Mayim Bialik in the 90s and Joey was one of her brothers.
Trivia: The flight attendant Monk drives crazy in 1-13 is played by his real-life wife. She also plays Sheriff Butterfield in "Monk visits a farm"and the crazy cat lady in 8-14.
Trivia: When Father Ted sees actor Richard Wilson from the hit TV series "One Foot In The Grave", Father Ted goes up behind Richard and says "I don't believe it." causing Richard to attack him. Richard Wilson has admitted that he really does hate when people come up to him and says his character's well known phrase.