Corrected entry: In 'Tikka To Ride,' Lister explains why people can't kill their past-selves. Near The End of the episode, we see JFK killing his past-self with no after effects.
Corrected entry: Contradicting what was said in the first ever episode of Red Dwarf ("The End") Lister says that he bought his pet cat, Frankenstein, on Titan, but in 'Ouroboros' he says he bought the cat while on Mimas.
Correction: Yes, that's right, but the flashback in which he states this fact takes place in Kochanski's universe, in which he may have got the cat on Mimas instead of Titan.
Corrected entry: Frankenstein is too young to be pregnant. Therefore, she could not have been the ancestor of the cat race.
Correction: Female domestic cats reach sexual maturity at five or six months old, but don't stop growing until they are twelve to sixteen months old. Frankenstein isn't fully grown, but that is no indication of her sexual maturity - or pregnancy.
Corrected entry: Lister says that, as long as his "ouroboros" cycle continues, the human race can never become extinct. But this is not true: someday Lister will die. The baby he fathered will not replace him, because he sent it back in time, where it starts its lifespan at the same time as him (and thus dies at the same time as him). The cycle is self-reinforcing, but not self-perpetuating. Thus, when Lister dies, the human race will indeed be extinct. (00:28:15)
Corrected entry: Lister only screws Kryten's head around once to get it on, but he had to do it several times in "Tikka To Ride" to get it on.
Corrected entry: Kryten remarks that he and Able are both "2X4C" models, when Kryten is actually a "2X4B" model.
Correction: Kryten is referred to at various points as a "Series III," a "2000 Series," and a "2X4B Model." Likely these various references are to different parts of him, (Processor, Hard Drive, etc.) so it's possible for him to contain both a 2X4B and a 2X4C model part and simply refer to himself as that particular model in some situations.
Corrected entry: Lister says that killing your past self will cause you to die, thus making it impossible to go back in time to kill your past self in the first place. So how was JFK able to kill himself at The End of the episode? If he killed himself, he would have still survived as he wouldn't have been unable to go back in time and kill himself in the first place, the same was as the crew survived their attack.
Correction: It's a temporal paradox - a mainstay of time-travel stories. As time travel doesn't exist, writers are allowed to handle these things in their own way. In this case, the Kennedy from a timeline where he survives is brought back to shoot his prior self. The moment that the bullet hits, reality shifts onto a new timeline, parallel to the other one. The living Kennedy's timeline no longer exists, but it doesn't erase the fact that it did exist - the crew don't lose their memories of the events that took place there and so forth - and so there was a Kennedy who survived Dallas who came back to alter the timeline.
Corrected entry: In the opening moments of the episode, The Cat reveals that he educated himself because there was no-one else around on Red Dwarf to teach him. Yet in the first ever episode, the Cat tells Lister that he learnt about Frankenstein and the 'virgin birth' whilst he was at 'kitty-school'.
Correction: In the first series, it is said that the only other cats were lame or stupid, and all died while Cat was still young. His 'kitty-school' may have been what those other cats told him, most of which he might have forgotten by adulthood, hardly a full education. It left him plenty of time to try and teach himself about his world.
Corrected entry: At The Beginning, Lister is giving the ship's log speech. When a light shines on his head you can see the shadow of a microphone on his forehead.
Correction: Maybe it's the microphone of the camera he's holding? It'd be a bit pointless to talk to a camera to make a ship log if there weren't some recording device attached to it.
Corrected entry: Miraculously, the crocodile hits the ground minutes after Ace lands, even though Ace used a parachute.
Correction: Seeing as Ace was previously using the croc to surf, perhaps the croc continued to circle for a while longer.
Corrected entry: At The Beginning of the episode, Kochanski is banging on the pipes with a spanner using her right hand. When the shot changes, she's using her left hand. There is no time for her to have changed hands between shots.
Correction: For the first half of the scene, Kochanski is using her right hand to hit the pipes, then bringing the wrench to the center of her chest and holding it with both hands. You can see this when she moves her left hand away from the wrench, and is still holding it with her right. The fourth time she hits the pipe, she holds the pipe with her right hand, and uses her left to swing the wrench. (Most likely, to try and avoid the set falling apart from the wrench assault.)
Corrected entry: At The End of the episode, Ouroboros, when the adult Lister places the infant Lister in a cardboard box (under the Grav-Pool table at the Aigburth Arms) the caption states "EIGHTEEN MONTHS LATER". At The Beginning of the episode, a definite date is stated - 26th November 2155. Presuming a normal full-term pregnancy, this indicates that (a) Lister was conceived in late April 2154, (b) born nine months later in the last week of May 2155, and (c) nine months old when he is found in the cardboard box.
Correction: Parts a and b are unfounded since Lister was conceived, born, and raised for 9 months in what is 'the present' for the show (3 million years in the future). He is then transported back through time and left as a 9 month old baby in a box under a pool table.
Corrected entry: Kryten says he hasn't seen his nanobots since the crew encountered the Esparanto in 'Back To Reality'. If this is true, then how did they repair him when he got crushed in 'Psirens'?
Correction: Perhaps they didn't. It has been established that Kryten has a few replacement parts on Starbug - more than likely he used those.
Corrected entry: If Able was addicted to Otrazone, and he was running out, why would he offer some of his remaining supply to Kryten?
Correction: He knew nothing about Kryten at that stage, and might have thought he was a fellow addict with supplies of Otrazone available to him. Making friends with him with a (small) nip might have made sense to him at the time.
Corrected entry: In the episode 'Tikka To Ride', Lister tells us he has recently passed his 28th birthday. He was 25 in 'Future Echoes', meaning that all the episodes up to this point have taken place in around 3 years. However, dialogue in 'Back To Reality' and 'Holoship' (which took place before 'Tikka To Ride') says that the crew have been travelling for around 4 years.
Correction: They have been travelling at very rapid speed, and relativity is starting to show its effects. They may think they've been in space for four years, but they have only aged three.
Corrected entry: If the people in the pub thought that Lister's parents wanted him to be named Rob or Ross (which is later confirmed when Lister works of what the words on his box meant) and presumably they told the orphanage this, how did he end up with the first name David?
Correction: His foster parents gave him the name they wanted out of contempt for whomever would be so callous as to leave their baby under a snooker table.
Corrected entry: All of Kryten's spare heads are supposed to have different personalities to the original Kryten head, but they all have the same one in this episode.
Correction: The personality depends upon the RAM chip that is in the head. Lister says that the RAM chip remains intact and therefore, they swap RAM chips when they change heads.
Corrected entry: In the episode 'Ouroboros', we see a Lister from an alternate dimension as a hologram - because he didn't go into stasis, he was killed in the radiation leak. However, in the first ever episode of Red Dwarf ('The End') it was established the radiation leak happened because of the fact Lister was in stasis and therefore Rimmer didn't have help in fixing the drive plate. There is an implication that, if Lister hadn't been put in stasis, the radiation leak would either never have happened, or been brought under control with few (if any casualties).
Corrected entry: In the flashbacks in the episode 'Ouroboros' Lister says the penalty for keeping his cat would be six months in stasis (which is what Kochanski gets in her reality), however in the very first episode of Red Dwarf ('The End') Lister gets 18 months in stasis as punishment for the crime.
Correction: Lister got a stiffer sentence for refusing to surrender Frankenstein. Captain Hollister might have gone easier on a woman for not being willing to give up the cat for dissection.
Corrected entry: In the first series, Lister smuggles a fully grown, pregnant cat on board. In series 7, the cat is just a kitten and not pregnant.
Correction: This takes place in a Parallel Universe where Kochanski was the one who was saved from the disaster which wiped out the crew. Therefore, it could be that in this dimension it was a kitten and got pregnant at a later stage.
Correction: There ARE after effects: JFK disappears.