In the conclusion of Lost's two-part series opener, the individual character traits of the survivors of a mid-air plane disaster come into sharper focus. While Jack (Matthew Fox), a troubled doctor, Kate (Evangeline Lilly), a mysterious, concerned survivor, and washed-up rock star Charlie (Dominic Monaghan) have gone to look for the front end of the plane in the jungle, the others get to know each other. Among the remaining survivors who are trapped on that somewhat surrealistic Pacific island are perennial jokester Hurley (Jorge Garcia), eternally bickering siblings Shannon (Maggie Grace) and Boone (Ian Somerhalder), nervous Korean couple Mr. and Mrs. Kwon (Daniel Dae Kim, Yunjin Kim), hair-trigger-tempered Sawyer (Josh Holloway), former Iraqi Republican Guard Sayid (Naveen Andrews), father and son Michael and Walt, very pregnant Aussie Claire (Emilie de Ravin)...and the secretive and possibly slightly sinister Locke (Terry O'Quinn). Still reeling from a close encounter with a terrifying (though unseen) beast in the jungle, Jack, Kate, and Charlie return to the beach with the transceiver, hoping that someone will be able to get it working. Not only are some of the surviving passengers not getting along very well, but the group later encounters an incongruous animal in the jungle and finds that there may have been a dangerous prisoner on board the plane.