0 in books and films, a situation in which a period of time is repeated, sometimes several times, so that the characters have to live through a series of events again:
If you watch a lot of Star Trek spinoffs, you're no stranger to time loops, temporal fluxes, and the rippling consequences of chance.
Three men drinking in their local pub discover they're trapped in a time loop in this offbeat British sci-fi comedy.
Storylines move backwards and forwards or start to go round and round in something Doctor Who might describe as a "temporal loop".
