Allison: Aren't you even a least bit jealous?
Joe: About this Johnny Dunham character? (sarcastically) Absolutely. It's all I can do to eat this bagel.
Larry Watt: Well, you certainly know your Central American porn, Manuel, I've got to give you that.
International Air Dates:
Norway: November 6th, 2007 on TV2
Czech Republic: February 16th, 2009 on Prima
David James Elliott was billed as Special Guest Star in this episode.
"Lullaby" by the Dixie Chicks (in Allison's dream sequences)
Although credited, David Cubitt (Det. Lee Scanlon) does not appear in this episode. This is the only episode this season in which he does not appear.
Title: Twice Upon A Time
This is a play on words of the famous first four words of many fairytales: "Once upon a time".