The main musical theme of the movie (at both beginning and end) is "Burning Bridges", sung by the Mike Curb Congregation with music by Schifrin. There is also a casual rendition of the music in the background near the middle of the film. The Mike Curb Congregation's recording of "Burning Bridges" reached #34 on the "Billboard" Hot 100 singles chart on March 6, 1971; but did much better in South Africa, where it was the #1 song on the charts for five weeks ending in November 1970, and in New Zealand, where it spent two weeks at #1 in March 1971. It also had a two-week stay at #1 in Australia, and in Canada the song reached #23 in March 1971.