In the Red Dwarf episode Ouroboros, Dave Lister must return to the Aigburth Arms to plant himself there as a baby (and therefore to ensure, due to the infinite loop in time, humanity will never truly die out)
How did he go back in time? I would have thought this was too large plot device simply to ignore.
My first thought is that he may have used the off photographic chemicals that they had in Timeslides, but I have no memory of this ever having been stated, or that the photographic chemicals survived the multiple time rewrites the episode used.
Was it ever stated, or discussed, how Lister did return to 2155?