In the season premiere episode, "The Beginning of the End," feeling that their rescue is close at hand, the survivors don't know whether to believe Charlie's final message that the people claiming to liberate them are not who they seem to be. 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. "Lost" stars Naveen Andrews as Sayid, Henry Ian Cusick as Desmond, Emilie de Ravin as Claire, Michael Emerson as Ben, Matthew Fox as Jack, Jorge Garcia as Hurley, Josh Holloway as Sawyer, Daniel Dae Kim as Jin, Yunjin Kim as Sun, Evangeline Lilly as Kate, Elizabeth Mitchell as Juliet, Terry O'Quinn as Locke and Harold Perrineau as Michael. Guest starring are Mira Furlan as Danielle Rousseau, Sam Anderson as Bernard, L. Scott Caldwell as Rose, Tania Raymonde as Alex, Blake Bashoff as Karl, Marsha Thomason as Naomi, Michael Cudlitz as Mike Walton, Lance Reddick as Matthew Abbadon, Grisel Toledo as orderly, Steven Neumeier as Lewis, Billy Ray Gallion as Randy, Jeremy Davies as Daniel Faraday and John Terry as Christian Shephard.How does it end? The rain and the fuselage return. Then somebody asks, “Are you Jack?” * Those said to be featured in the episodes scripted before the writers’ strike: 4.1 “The Beginning of the End”: Hurley 4.2 “Confirmed Dead”: The “Rescuers” 4.3 “The Economist”: Sayid 4.4 “Eggtown”: Kate 4.5 “The Constant”: Desmond 4.6 “The Other Woman”: Juliet 4.7 “Ji Yeon”: SunJin 4.8 “Meet Kevin Johnson”: Michael Take up valuable bandwidth with your predictions and reactions. 9 p.m. Thursday. ABC.