Following the encounter with their future selves, Kryten forbids the use of t...
Red Dwarf
Season 7 Episode 3: Ouroboros
Starbug flies into a Dimensional Tear and the crew meet themselves from an alternate reality where Lister is a hologram and Kochanski is alive. When a GELF ship opens fire on Starbug, alternate Kochanski becomes stranded with no way home.