Charlie begins a painful journey of withdrawal from drugs, surprisingly aided by Locke, whose true motive for helping Charlie is a mystery.
Meanwhile, survivors struggle to find and free Jack when he's buried alive in a cave collapse, and someone might be secretly thwarting Sayid, Kate, and Boone when they enact a plan to find the source of the French transmission.
original airdate--November 3,2004 rating--18.73 million
music--theme song "Here I Am" by Chemistry
Flashback: Charlie Pace
Goofs--(Visible crew/equipment): When Charlie goes to his brother's house and opens the door and knocks, you can see the black boom pole reflected in the window.
Title Meaning: Locke tells Charlie that he could help him by burning his heroin for him but by keeping it around he'll have to struggle to quit which in turn will help him survive. He then compares the situation to a nearby moth who's trying to break out of its cocoon. Locke says that he could use his knife to cut open the cocoon and help the moth but then the moth wouldn't have the strength to survive.Charlie later sees a moth in a cave, which helps him find an escape from the cave-in that has trapped him and Jack.