The soundtrack to The Departed, Martin Scorsese's remake of the Hong Kong film Infernal Affairs, is a collection of mainly classic rock 'n' roll songs. Music has always been an essential component of a Scorsese movie. Every song is carefully picked by the filmmaker to illustrate something about the characters or a scene. The 12 tracks on the album give listeners (even those who haven't watched the film) a feel of the movie. Most of the numbers are guitar-driven rock songs. The opening track, Comfortably Numb, is a song from Pink Floyd's album The Wall. It is performed by Roger Waters, Van Morrison and The Band and contains some electrifying guitar solos. Another highlight is Let It Loose by the Rolling Stones, a band whose music features in almost every Scorsese gangster epic. The dreamy guitar in Sweet Dreams by Roy Buchanan, a legendary American guitar and blues musician, makes it another stand-out track. The album ends with two instrumental tracks written for the movie by Howard Shore. The Departed Tango is a lively number while Beacon Hill is a melancholic guitar piece performed by classical guitarist Sharon Isbin. A great album from a great movie, The Departed is a must-buy for music and film lovers.