After discovering something odd just offshore, Jack and Sayid come up with a plan to confront "The Others" and hopefully get Walt back. At the same time there will be an answer to the question of where Michael has been and resolution of him and Walt. Meanwhile, Eko and Locke come to blows as Locke makes a potentially cataclysmic decision regarding the "button" and the hatch. Lastly, Desmond returns and he sheds some more light on his experience on the island in the three years prior to when Locke came down into that hatch.
Elenco: Naveen Andrews , Matthew Fox , Josh Holloway , Daniel Dae Kim , Evangeline Lilly , Terry O'Quinn , Emilie de Ravin , Michael Emerson , Henry Ian Cusick , Kim Yoon-jin , John Terry , Sonya Walger , Cynthia Watros , Rebecca Mader , Fionnula Flanagan , Maggie Grace , Jeremy Davies , François Chau , L. Scott Caldwell , Ian Somerhalder , Elizabeth Mitchell , Sam Anderson , Dominic Monaghan , Zuleikha Robinson , Nestor Carbonell , Jeff Fahey , Jorge Garcia , Ken Leung , L. Scott Caldwell , M.C. Gainey , Mark Pellegrino , Michelle Rodriguez , Mira Furlan , Nestor Carbonell , Rebecca Mader , Rodrigo Santoro , Sam Anderson , Sonya Walger , Tania Raymonde , Titus Welliver , Zuleikha Robinson .