The survivors begin to question the intentions of their supposed rescuers when four strangers arrive on the island.
Sayid confronts Ben's spy on the freighter, and Ben urges daughter Alex to flee Locke's camp in order to survive an impending attack.
McGarrett and Odell come under siege in Odell's barbershop when they try to protect a young man who is being hunted down by a gang. Also, Jerry is wrongfully accused of committing a series of home invasions.
Six months after adventurer Dr. Emmet Cole goes missing in the Amazon, his location beacon sends out a signal; Emmet's wife, Tess, along with her son and Emmet's film crew, embark on a journey to find him.
