Trust Issues
Jack, Sawyer and Kate are being held prisoner by the Others. Kate's in a locker room, Sawyer's in a cage and Jack is in some underground bunker (call it the Hydra Station) where he meets Juliet. She seems pretty nice, but Jack doesn't trust her. That's probably wise. Because Juliet looks to be a close friend of Henry Gale, who is really Ben Linus, leader of the Others.