Do you have an idea for a new wiki? Please share it with us here
Take the Dharma Wants You test, all about Lostpedia, here
Flashforward
From Lostpedia
A flashforward (or prolepsis, also sometimes known as flash-forward or flash-ahead) in a narrative occurs when the primary sequence of events in a story is interrupted by the interjection of a scene representing an event expected, projected, or imagined to occur at a later time. The flashforward technique is used less frequently than its reverse, the flashback.
In Lost, the flashforward technique was introduced in "Through the Looking Glass", although it wasn't made clear that it was a flashforward until the end of the episode. The first episode to feature a flashforward that was clearly shown to be one from the start was "The Beginning of the End". "Ji Yeon" was the first episode to intertwine flashbacks with flashforward, although the flashback element was only clearly revealed to be in the past at the end of the episode, making its temporality a plot twist, albeit one that perhaps caused confusion among some viewers.
See also

