Music plays a big part in the themes of LOST. Music is often played at the end of an episode to set the theme of the show, or played during the show on the Swan's record player to enhance a particular scene.
This song is heard at the beginning of "Man of Science, Man of Faith" as Desmond goes through his day to day exercises and chores. It is also heard in at the end of the episode (and in the alternate angle scenes from "Adrift") when Jack enters the Hatch. The song is also heard twice in the pub in Desmond's flashback in "Flashes Before Your Eyes" outdoor fountains.very briefly play's in the car ride with Juliet Burke and her sister to the new job.
The song is playing in the hatch when Kate tends to an injured Sawyer. the song is also playing in the car when Ana-Lucia and Christian are driving to Lindsey's house. The song was also heard at the beginning of "Left Behind" in Kate's flashback.
This song is heard over the radio that Sayid and Hurley are listening to while searching for signals with the radio the tail section brought back with them, and when Jack watches Sarah from his car at the playground.
This song appears both at the beginning of the episode when Young Hurley is working on the car, and later when Hurley, Charlie, Jin and Sawyer are riding around in the van on the island. The song is also heard in Ben's flashback, where we see Ben and his father listening to the song together inside the van.
During Desmond's flashback in "Flashes Before Your Eyes", Charlie is seen on the streets of London playing for on-lookers, and he sings this song for the crowd. Sans Desmond, this same scene is repeated in the episode "Greatest Hits".
"You All EveryBody", performed by Charlie and Liam Pace of Drive Shaft in "The Moth". The song is also heard in "Homecoming" when Charlie meets Lucy. A variation of the song is heard in "Fire + Water" when Drive Shaft is filming their commercial for Butties Diapers. In "Greatest Hits", Drive Shaft listens to their hit song being played on the radio for the first time.
A record found inside the hatch of unknown origin. Eddie is seen wearing a Geronimo Jackson shirt in Locke's flashback, and Mike is familiar with the band. Locke had a vinyl record jacket in his locker in high school. The DJ at Hurley's birthday party, had a Geronimo Jackson record.
On March 21, 2006, the original television soundtrack to Lost was released by the record label Varese Sarabande. It includes full length versions of the themes heard on the show during the first season.
On May 6, 2008, Varese Sarabande released another soundtrack album featuring music composed by Giacchino from the show's third season. The soundtrack contains two discs: the first featuring selected music from the season, the second featuring the entire original score from the acclaimed season finale episodes, "Greatest Hits" and "Through the Looking Glass".