Lalo Schifrin's working score for 1973's The Exorcist was rejected by the film's director, William Friedkin. Lalo Schifrin had written six minutes of difficult and heavy music for the initial film trailer, but audiences were reportedly frightened by the combination of sights and sounds. Warner Bros. executives told Friedkin to instruct Schifrin to tone it down with softer music, but Friedkin did not relay the message. Lalo Schifrin's final score was thrown out into the parking lot.
Howard Roberts played rhythm guitar, lead guitar, bass in the studio and for television and movie projects, including lead guitar on the theme from The Twilight Zone (1959 TV series) The Twilight Zone, as well as the acoustic and electric guitar themes in The Munsters, Get Smart, Batman, Peter Gunn, Johnny Quest, Mannix, Lost in Space, Dragnet, Wild Wild West, Mission Impossible, 'I Dream of Jeannie and the theme for the film classic Bullitt.