"The Moth" is the seventh episode of the first season of Lost. The episode was directed by Jack Bender and written by Jennifer Johnson and Paul Dini. It first aired on November 3, 2004, on ABC. The character of Charlie Pace (Dominic Monaghan) is featured in the episode's flashbacks.

Charlie begins experiencing the effects of heroin withdrawal, while Jack becomes trapped in a cave. Meanwhile, Sayid Jarrah (Naveen Andrews), Kate Austen (Evangeline Lilly) and Boone Carlyle (Ian Somerhalder) attempt to triangulate the signal of the French woman's broadcast. Charlie's involvement in his band Drive Shaft is featured in the episode's flashbacks.

The Moth (Lost)

"The Moth" was watched by 18.73 million people live, almost two million more than the previous episode. This episode marks the first time "You All Everybody" by Drive Shaft was sung in its entirety, as it had not been written yet in previous episodes. The episode received mixed-to-positive reviews, with some reviewers commenting that the episode was not of the same caliber as previous episodes.

The Moth (Lost)

Plot

Flashbacks

Charlie (Dominic Monaghan) tells a priest that he is going to quit his band because it has a bad influence on him. Soon after, his brother, Liam Pace (Neil Hopkins), tells Charlie that Drive Shaft has gotten a recording contract. Charlie doesn't want to sign the contract because he has qualms about the sex and drugs the band engages in. Liam talks him into signing, promising that Charlie can quit any time he's had enough. One evening at a show, Liam, to Charlie's frustration, starts singing the chorus to "You All Everybody", which is supposed to be sung by Charlie. Liam assures Charlie it won't happen again.

The Moth (Lost)

Later, Charlie finds Liam high on heroin with groupies. Charlie kicks the groupies out, and tells Liam that he's done with the band. Liam says to Charlie that he, Liam, is Drive Shaft, and that nobody knows who the bass player (Charlie) is. He goes on to tell Charlie that without the band, Charlie is nothing, which spurs Charlie to use heroin for the first time. Years later, Charlie visits Liam's house in Australia and wants Liam to rejoin Drive Shaft for a comeback tour. Liam declines, but the band can't do the tour without him. He criticizes Charlie for still using drugs, and Charlie blames Liam for getting him started with drugs. Liam asks Charlie to stay with him for a few weeks, saying that Sydney has some good rehab programs and that he can get Charlie help. Charlie angrily leaves, saying he has a plane to catch.

On the Island

It is Day 8, September 29, 2004, and Charlie is suffering from heroin withdrawal since he voluntarily gave his heroin to John Locke (Terry O'Quinn) in the previous episode. After finding him, Charlie asks Locke for the heroin back, and Locke says that he'll give Charlie the drugs the third time he asks, because he wants Charlie to have the choice to quit.

Sayid Jarrah (Naveen Andrews), Kate Austen (Evangeline Lilly) and Boone Carlyle (Ian Somerhalder) attempt to find where the French transmission is coming from, so they make a plan to turn on antennas at different points on the island in an attempt to triangulate the signal. At the caves, Charlie searches through Jack Shephard's (Matthew Fox) medicine supply for something to ease his heroin withdrawal. When Jack catches him with diazepam, Charlie claims he has a headache and was looking for aspirin.

When Jack upsets Charlie by telling him to move his guitar, Charlie angrily shouts at him, causing the entrance of the cave they are in to collapse. Charlie manages to escape, but Jack is trapped inside. Using his construction experience, Michael Dawson (Harold Perrineau) leads the rescue attempt with Steve Jenkins (Christian Bowman) and Scott Jackson (Dustin Watchman). In the jungle, James "Sawyer" Ford (Josh Holloway) goes to tell Kate (who is traveling to set up her antenna for the triangulation attempt) about Jack's predicament, but decides against it because he doesn't like Kate's hostile attitude. Charlie tells Locke about Jack's situation, but reveals the real reason for his going to Locke is to ask for his drugs a second time. Locke shows Charlie a moth cocoon, and explains that he could help the moth by slitting the cocoon and letting the moth free, but it would not survive because it would be too weak. Instead, the moth needs to struggle to break free. Nature and struggle make people stronger, Locke says, indicating to Charlie that he needs to fight through his suffering.