Jon Dixon

Out of the blackness, the first thing Jack (Matthew Fox) senses is pain. Then burning sun. A bamboo forest. Smoke. Screams. With a rush comes the horrible awareness that the plane he was on tore apart in mid-air and crashed on a Pacific island. From there it's a blur, as his doctor's instinct kicks in: people need his help.

The discovery of a transceiver among the plane's wreckage and the thought that rescue could be imminent temporarily raises the castaways' spirits. The island's mysteries continue to baffle with the discovery of handcuffs, a gun, and an animal that shouldn't be able to survive in a tropical climate.

Sydney is called in to meet with Mitchell Yager, a counter-intelligence analyst who is investigating Vaughn.

Sydney confronts her mother, who reveals her true motivation; Will struggles to figure out who is behind the setup.

Sydney must seduce a murderous arms dealer in order to track down a stolen NSA code-breaker. Meanwhile, Vaughn fears for Weiss's life, and Sydney and Jack argue about telling Nadia the truth about her mother.