Bah, It just drags on, No real plotline.
Here you go
Spoiler Alert!Season 4 will feature 16 episodes that will begin airing in the United States and Canada sometime in February of 2008. The season will run all of its episodes consecutively without repeats.
On May 7, 2007, ABC Entertainment President Stephen McPherson announced that Lost will end during the 2009-2010 season with a "highly anticipated and shocking finale." "We felt that this was the only way to give it [Lost] a proper creative conclusion," McPherson said. Beginning with the 2007-2008 television season, the final 48 episodes of Lost will be aired as three seasons with sixteen episodes each. Thus, Lost will conclude with its sixth season. These seasons are to air uninterrupted from February to May.
The announcement by ABC was called "bold and unprecedented" by Lost's executive producers Damon Lindelof and Carlton Cuse. Lindelof and Cuse also stated that they "always envisioned Lost as a show with a beginning, middle, and end," and that by announcing when the show would end that viewers would "have the security of knowing that the story will play out as we've intended."