Here's the official press release.
With only 48 original episodes left until the final episode airs in 2010, this season truly is the beginning of the end with the promise of rescue at hand. Jack has radioed a freighter stationed somewhere off the island. But when it's disclosed that Charlie's dying warning was that these people may not be who they say they are, the castaways are split as to what to do. Jack is convinced that the freighter people are there to rescue them, while Locke is not. A division occurs among the survivors. Who is on the freighter? What was the significance of the flash-forward showing Jack and Kate off the island at some point in the future? What will the consequences be when the characters once again encounter Michael, who seemingly escaped the island after murdering two of the survivors? These are some of the questions "Lost" will explore during the action-packed fourth season.
The band of friends, family, enemies and strangers must continue to work together against the cruel weather and harsh terrain if they want to stay alive. But as they have discovered during their 90-plus days on the island, danger and mystery loom behind every corner, and those they thought could be trusted may turn against them. Even heroes have secrets.
Source: ABC
Hurley! Locke!
