Red Dwarf s12e06_Skipper

The crew look through Captain Hollister's files on the crew, where he derides both Lister and Rimmer as terrible employees. While Lister shows little care over it, Rimmer is angered and insults the other three, claiming he should've surrounded himself with people more successful than him (with them pointing-out that they are). Later in the day, Kryten notices a strange phenomenon on the monitors, which turns out to be a disruption in spacetime that reverts their timeline to one where their actions are or aren't taken. Such as switching from the timeline where Cat doesn't cook Lister breakfast to the one where it does.

After regrouping, the crew discover it was Kryten's new invention, the quantum skipper, which caused the error in time. After fixing his mistake, Rimmer requests he use the quantum skipper to traverse realities to find a better universe to live in compared to the one he's living in now. Kryten agrees, and the three see him off as Rimmer unceremoniously takes off. The first universe Rimmer travels to sees him on Red Dwarf pre-radiation leak; here, Rimmer is a hologram, unlike in his reality where he was alive before it occurred. After meeting-up with that universe's Holly and Captain Hollister, who was attempting a futile escape on a jammed escape pod, Rimmer escapes to a new universe. In the next one, Rimmer meets a more distinguished version of the crew, only for this universe's Cat to instead be a human-sized rat, known as Mr. Rat, alongside an entire race of rats who, unlike Cat's species, never left Red Dwarf. Rimmer decidedly leaves that one, and travels across several others, all he loathes.

Finally, he reaches one where he is an officer on Red Dwarf, is married, and has four boys — all of which Rimmer has always wanted. When reporting to the captain, however, he discovers Lister is the captain, having been the one to prevent the initial radiation leak and becoming immensely rich off Red Dwarf stocks when it discovered a valuable gas moon. Despite all his successes, Rimmer decides to abandon that universe, unable to cope with Lister being more successful than him. He returns to his original universe and joins the crew for a game of cards, with Lister remarking even with infinite universes at Rimmer's disposal, "infinite clearly wasn't enough"