8 Amazing Red Dwarf Details You Never Noticed

8. Lister's Appendix Removed... Twice

Continuity has always been an iffy subject aboard Red Dwarf. Considering Lister is his own father, Kryten's accent keeps changing and they've been to many a parallel dimension, it's hard to keep track of things.

So whilst Legion removing Lister's appendix in series six was one of the show's grossest sight gags, it also brought up another one: Lister's already had an appendectomy.

As mentioned in series two episode, Thanks for the Memory, Rimmer states that because he has Lister's memories, he's had his appendix removed twice. Confusing, right?

Numerous theories have tried to explain this: season four's DNA has Lister rebuilt, possibly including his appendix again. Timeslides sees Rimmer rewriting the past and bringing the crew back, whilst the Inquisitor could have also done the same.

Whatever the reason, it would have gone over many a casual viewer's head as just another gag. The problem is us Red Dwarf fans are always looking for a continuity error, especially when there's time travel afoot.