 Charlie begins a drug withdrawal after Locke takes away his heroin stash, and will give it back to him only if he asks for it three times. Later, when Charlie and Jack fight in a cave near the waterfall, it collapses. Charlie gets away, but Jack is buried inside the cave. While Hurley, Michael and the other the castaways try rescue Jack, Sayid goes off with Kate and Sawyer to out where the French transmission is coming from.