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Time loop
Plot device in science fiction
This article is about the fictional plot device. For the philosophical and physical concept, see Causal loop.
The time loop or temporal loop is a plot device in fiction whereby characters re-experience a span of time which is repeated, sometimes more than once, with some hope of breaking out of the cycle of repetition.[1] Time loops are constantly resetting; when a certain condition is met, such as a death of a character or a certain point in time, the loop starts again, possibly with one or more characters retaining the memories from the previous loop.[2]
The term "time loop" is also sometimes used to refer to a sequence of events involving travel back in time, in which the chain of causality is circular.[1]