Rimmerworld - S6-E5
Continuity mistake: At The End of the episode, when Lister says, 'I'm saying nothing man, don't want to spoil the surprise,' his hood and locks are arranged completely different than all other shots in the scene. (00:27:20)
Continuity mistake: When Legion brings the feast, Kryten is stood by the door. Rimmer says about how he appreciates art, then in the next shot of the Cat, Kryten walks behind him. Kryten would have had to walk past Rimmer in the previous shot to get there yet we did not see him while Rimmer was talking. (00:13:15)
Gunmen of the Apocalypse - S6-E3
Continuity mistake: When Lister leaves the saloon, his gloves appear on his hands between shots as he goes outside. (00:21:45)
Gunmen of the Apocalypse - S6-E3
Continuity mistake: When the Apocalypse boys shoot the bottle out of Kryten's hand, you can see Kryten drop the bottle neck. In the next shot he is still holding it. (00:14:45)
Gunmen of the Apocalypse - S6-E3
Continuity mistake: When the Cat realises he has lost his special skills, Lister is looking straight forwards. In the next shot he is looking down at the ground. (00:24:50)
Gunmen of the Apocalypse - S6-E3
Continuity mistake: When Jimmy does his trick with the whip, it knocks Kryten's hat to the floor. In the next shot it is lying on the bar. (00:20:00)
Gunmen of the Apocalypse - S6-E3
Continuity mistake: When Lister says the escape pod is not an option, his hands are apart in front of him. In the next shot, they are together. (00:12:20)
Gunmen of the Apocalypse - S6-E3
Continuity mistake: Just after the virus infects the ship, the Cat is looking straight forwards. In the next shot he is looking to the far left at Lister. (00:10:45)
Gunmen of the Apocalypse - S6-E3
Continuity mistake: When Lister enters the bar, he goes through the swing doors and they close behind him. In the interior shot Both Lister and the Cat have gone though the swing doors. (00:17:10)
Emohawk - Polymorph II - S6-E4
Continuity mistake: Just before the damage report machine explodes, the room is full of smoke. As it explodes, all the smoke is gone. (00:07:40)
Continuity mistake: When Lister is watching the video message of a psiren, posing as Kochanski, Lister asks "How? I don't understand" and Kochanski, on the video appears to move her face beginning to reply, but when the shot cuts back to the video, Kochanski's face is suddenly still. (00:16:20)
Continuity mistake: When Lister finishes pouring a glass of Bucks Fizz, he begins to place the jug back on the table with his hand still on it, but in the next shot, the jug is now on the table with Lister's hand nowhere near it. (00:20:20)
Continuity mistake: When Rimmer suggests bringing Legion with him, Lister says he's not going to come with them, and asks if he would ever join in on their late night sessions of pin the pointy stick on the weather girl. At The End of the line, Lister is looking to the right, but in the next shot, he is suddenly looking downwards. (00:12:35)
Continuity mistake: When Legion puts his mask back on, just as he says "Kryten knows", the mask is not properly fixed on, leaving his chin exposed, but when the camera is on him next, the mask is suddenly fixed into place. (00:21:35)
Gunmen of the Apocalypse - S6-E3
Continuity mistake: When Lister tells Rimmer that the escape pod is not an option, Lister is looking at Rimmer, but in the next shot, he is looking down at Kryten. (00:12:20)
Gunmen of the Apocalypse - S6-E3
Continuity mistake: The Cat brings down the town sign by shooting the right hand side of it. Seconds later, when they pick Kryten up, the sign is hanging in front of the Livery building, which would only have been possible if he'd shot the left hand side.
Suggested correction: Lister can only see M-Corp products and M-Corp employees. Cat is not an employee of JMC or M-Corp, so he disappears. Lister is the only member of the crew who is employed by M-Corp at this point.
Suggested correction: Cat was a descendant of the cat Lister brought aboard Red Dwarf. Would it be possible that the new owners might have stricter security controls, and Lister was sent to Stasis for a different reason?
Andy Benham ★
Inventing Deux ex machina explanations for a plot hole doesn't make it any less of a plot hole. M-Corp erases all of the Jupiter Mining Corporation's equipment, personnel and infrastructure from Lister's life. In no way is Cat a part of that. He has no connection at all to the Jupiter Mining Corporation, and until he meets him in Episode 1 no connection to Lister, either.
If M-Corp only erased JMC equipment from Lister's life, then Kryten, who belongs to DivaDroid and not the JMC, wouldn't have disappeared either. He disappears as he doesn't belong to M-Corp, not because he belongs to the JMC. Cat has no connection to M-Corp, as he wasn't a part of the JMC (as you pointed out), and is therefore erased for Lister.