Continuity mistake: When the ducts are being backwashed, Lister's dreadlocks are on his right shoulder. But when the shot changes and he says "I hate this. I really hate this.", his locks are on his left shoulder. Then the shot changes again and they're back on his right shoulder.
Continuity mistake: When the simulant walks past Lister, the Cat and Kochanski who are hiding under the blanket, he walks to the far right of the shot and a piece of material is hanging from him as he stops. The shot changes to show the simulant walking through the doorway, yet when the camera cuts back to Lister, the Cat and Kochanski, the piece of material is still in the corner of the screen meaning the simulant is still stood there.
Continuity mistake: When the Nazi commander throws the crocodile at Ace, the yellow curtain is behind ace as he falls. In the next shot, the yellow curtain is in front of him. It is clear he did not fall through the curtain as it does not move as he hits the floor.