Continuity mistake: Near the end of the episode, after the simulant has strangled itself, it is lying flat on his back. When the Cat comes up behind it to attack it with a spade, the simulant is half sitting up. 26.20.
Factual error: The justice computer states that Rimmer is guilty of 1167 counts of 2nd degree murder, each carrying a sentence of 8 years giving a total of 9328 years. This is equivalent to 1166 counts.
Visible crew/equipment: When the crew are standing before the Judgement computer (when Lister is worrying that he will be sent to prison) if you look above Lister's head you can see a microphone bob up and down into shot.