There have been several occasions when an episode of Lost has been required to run longer than the usual 40 to 42 minutes and has been extended by around five minutes to avoid cutting important scenes. Also, the final two episodes of each season have been written to be aired as a single two-hour finale episode.


The following episodes have been extended:

Season 1

Season 2

Season 3

Season 4

Season 5

Season 6

  • "LA X, Parts 1 & 2" – Season 6 premiere
  • "Ab Aeterno"
  • "The End" - Season 6 and series finale. The episode was extended by 30 minutes (22 minutes of footage) to 2 1/2 hours