If you drive through Ames, Iowa, this week you may see a billboard for Oceanic Airlines.

If it sounds familiar, but you don't think you've seen tickets offered on Orbitz, you may be a "Lost" fan. FlyOceanicAir.com is the Web site offered on billboards in Ames and other cities across the country. It takes you down the rabbit hole, into a world where a flight has been lost, but an airline is fighting back against bad publicity.

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 answers to these questions start being revealed when ABC brings "Lost" back on Jan. 31.