Lost returns for its fourth season of action-packed mystery and adventure - that will continue to bring out the very best and the very worst in the people who are lost.
After Oceanic Air flight 815 tore apart in mid-air and crashed on a Pacific island, its survivors were forced to find inner strength they never knew they had in order to survive.
But they discovered that the island holds many secrets, including a mysterious smoke monster, polar bears, housing and hatches with electricity and hot and cold running water, a group of island residents known as "The Others," and a mysterious man named Jacob.
The survivors have also found signs of those who came to the island before them, including a 19th century sailing ship called The Black Rock, the remains of an ancient statue, as well as bunkers belonging to the Dharma Initiative - a group of scientific researchers who inhabited the island in the recent past.
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 split 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.
Season 4 Issues
A number of issues will be resolved this season.
What happened between Ben and the real Henry Gale and how Ben was caught in Rousseau's trap on the survivors' 58th day will be explained.
The four-toed statue will be addressed.
Whether or not Kate is pregnant with a baby from Sawyer will be revealed in the first four episodes.
What happened in the Hatch during its implosion will be explored.
The fate of Sun and her unborn child will be made clear.
What happened to Dr. Marvin Candle's arm will be addressed.
How Libby wound up in the mental institution will be shown.
What happened to Ben's childhood friend Annie will be revealed.
More will be seen of the authoritative Other Jacob.
Episodes will continue to feature flashbacks, in addition to flashforwards.
Not all the survivors make it off the island. There will be more deaths, some of which take place in flashforwards.
Time travel and other supernatural elements will be a part of the season, and decoy endings have been shot.
In an interview with the Chicago Tribune, Damon Lindelof said that while "the show hasn’t entirely abandoned flashbacks...we’re done telling flashback stories that are not relevant to the uber-story of the island."