Contrary to popular rumours, the dog food eaten by Craig Charles in this episode was not real. He says in Red Dwarf: All Change - Series III (2003) that it was actually tuna mixed with meat jelly - although he added that it might as well have been dog food, as it tasted horrible.
The snowflakes were actually made of soap flakes which the cast ended up getting in their eyes and mouths. According to Craig Charles, he tasted soap in his mouth for weeks.
Ed Bye decided to shoot the scenes between Lister and Rimmer on handheld camera in order to add to the claustrophobic feeling.
The scene which Rimmer talks to Lister about Alexander The Great had to be filmed twice because Chris Barrie's line "I was Alexander The Great's chief eunuch" unintentionally made Craig Charles lose it.
Craig Charles admitted in a interview that is a favorite episode of his, because it would had made a good stage play. Chris Barrie has also named it as one of his all-time favorites.