Red Dwarf: 2x4

Stasis Leak

A tear in the fabric of space and time appears on one of the ship’s lower decks, opening a doorway to Earth in the distant past. Arriving three weeks before the Red Dwarf disaster, the crew decide to right the wrongs of history, albeit on an entirely selfish basis. While Rimmer tries talking his former self into cryogenic stasis, saving himself from the catastrophe, Lister makes a beeline for Kristine Kochanski, oblivious to the fact that she’s already married.