Lost is an American drama television series that aired on ABC from 2004 to 2010, over six seasons, comprising a total of 121 episodes. The show contains elements of supernatural and science fiction, and follows the survivors of a commercial jet airliner flying between Sydney and Los Angeles, after the plane crashes on an island somewhere in the South Pacific. The story is told in a heavily serialized manner. Episodes typically feature a primary storyline set on the island, augmented by flashback or flashforward sequences which provide additional insight into the involved characters. Developed as a television adaptation of the 2000 Tom Hanks film Cast Away, Lost was one of the most expensive series ever made, with the pilot alone costing over $14 million. Lost has regularly been ranked by critics as one of the greatest television series of all time... Season 2 follows the growing conflict between the survivors and the Others and continues the theme of the clash between faith and science, while resolving old mysteries and posing new ones. The four survivors in the raft are ambushed by the Others, and they take Walt, Michael's son. The survivors are forced to return to the island, where they find the tail-section survivors (the "Tailies"). A power struggle between Jack and John Locke over control of the guns and medicine located in the hatch develops, resolved in "The Long Con" by Sawyer when he gains control of them. The hatch is revealed to be a research station built some thirty years earlier by the Dharma Initiative..."