Alexander John-Jules, who plays baby Lister, is Danny John-Jules' nephew. John-Jules suggested his nephew when he saw a picture of the baby who was originally cast and saw that his skin colour did not match Craig Charles'.
According to Robert Llewellyn, during the scene in which the Dwarfers meet Kochanski, he could not stop staring at Chloë Annett's behind. So he decided to get on his knees and stare closely at her behind until he was bored and could concentrate on his lines.
'Ouroboros' is the name of an ancient symbol, usually of a serpent swallowing its tail. While the symbol has been given many meanings over the centuries and has been associated with mythology, religion and alchemy, its meaning here relates to cyclic - or looped paradox. In this case, something which causes its own existence.
The "Aigburth Arms" is a real pub in Liverpool that Rob Grant and Doug Naylor used to frequent. It is now called "The Victoria".
The episode ran long and as a result was the first of two consecutive episodes to air without opening credits. When an extended version was created for the VHS release, the credits were put back on, however the "filmising" process applied to the episode was not applied to the credits, providing a brief glimpse of how Series VII looked in its original shot-on-video form.