Backwards episode

Quite a number of television shows have had episodes which were narrated in reverse chronology, due possibly to narrative style, some sort of time travel mechanism, or a character (or society) who perceives time passing in the opposite direction. These are not simply episodes which allow a character to travel back in time, and relive the period forward; rather they are episodes where the period of time is either experienced or recounted from the chronological end to the chronological beginning. Those incorporating a time travel mechanism may or may not allow characters to break out of their destiny. Various backwards episodes include:

...
Wikipedia