Stasis Leak - S2-E4
Continuity mistake: When the crew go through the Stasis Leak for the first time, the Cat walks through, then Rimmer waits before jumping through. When they appear on the other side, they fade in together. (00:09:45)
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. (00:11:10)
Audio problem: When Kryten says 'Excuse me, could I just distract you for a brief second?' his lips are out of sync with the dialogue and continue to move after he has finished speaking. (00:23:35)
Continuity mistake: When the Captain is making his speech for George McIntyre, he takes his hand out of his pocket and touches his glass. In the next shot, his hand is back in his pocket again. (00:10:35)
Revealing mistake: When Lister types Starbug's co-ordinates for the distress call, Lister's fingers do not touch the keyboard. (00:03:00)
Emohawk - Polymorph II - S6-E4
Revealing mistake: When the grenade explodes, the explosion is to the left of where the grenade landed. (00:26:50)
Continuity mistake: Just before Rimmer and Lister drink the hooch, Lister's locks are behind his back, then one of the locks moves to in front of his left shoulder during a brief shot of Rimmer. (00:13:30)
Visible crew/equipment: When Lister, the Cat and Kochanski arrive in the game and start walking towards the camera, a boom mic bobs briefly into the shot. (00:03:55)
Out Of Time - S6-E6
Continuity mistake: When Rimmer picks up the bazookoid at The End of the episode and runs into the engine room, the gun is pointing up. In the next shot from inside the engine room, it is pointing down. (00:27:10)
Continuity mistake: During the Higher Cat and Rimmer's dance when Kryten says 'and agony in torment' his arms are by his sides. In the next shot, his right arm is raised. (00:11:40)
Revealing mistake: When the simulant pulls the knife out of his chest, you can see the knife is a dummy. As the handle is pulled back, the blade does not move at all. (00:25:30)
Continuity mistake: When the Cat dances at the disco, he jumps up and grabs the mirror ball with both hands. In the next shot he is only holding it by one arm. (00:20:25)
Stasis Leak - S2-E4
Continuity mistake: When Lister first walks through the Stasis Leak, his locks are over his left shoulder, then in the bathroom they are over both shoulders. (00:09:30)
Answer: The cello is a large four-stringed instrument, which, when it is played, stands vertically on the floor between the player's legs (assuming they are seated). If it is to grow as large as the other instuments mentioned will, it would require a rather unseemly lack of femininity to be able to encompass it with the legs.
Rooster of Doom