Flashes Before Your Eyes

Flashes Before your Eyes is the 8th episode of season 3 of Lost. Desmond Hume is in the episode's flashbacks, although the flashbacks are actually Desmond reliving a part of his life after imploding the hatch.

ABC press release
A suspicious and determined Hurley enlists Charlie to help him wrangle the truth out of Desmond, who has been acting strangely ever since the implosion of the hatch.

Former spoilers and rumors

 * Kristen Veich (E! Online correspondant): This episode will feature Charlie flashbacks.
 * FALSE
 * Carlton Cuse (Writer, producer): The kidnapped tail section survivors, including the children and Cindy, will return in this episode.
 * FALSE, this was moved to episode 9.
 * Damon Lindelof (Co-creator, writer): The format of this episode is unlike any other episode, and the format will never be used again.
 * TRUE