Plot hole: The man the crew find stampeded to death had been lying in the road for a year, yet he had not began to decompose. (00:17:50)
Suggested correction: There's nothing stating that the body had been lying in the road for a year. Rimmer says it looks like the man was trampled to death in some kind of stampede, but it isn't confirmed if that's how he died (Rimmer is often wrong about many things), or when it might have happened.
Trivia: On the DVD, you can watch this episode backwards. This way, not only can you find out roughly how they made this episode and find out what 'reversed' people are saying, you can hear someone shout 'ACTION' right before the brawl scene.
Suggested correction: This episode is available backwards on YouTube, too.
Factual error: The polymorph goes through a metal pipe and a tap which bulges and becomes mis-shapen. The tap then changes back to its original shape, which is impossible. (00:18:00)
Suggested correction: It's impossible using today's technology, but maybe not in the future. Maybe they have metallic-like materials that flex back to a previous form after deformation.