Brancucci — whose other collaborations with Morricone include "Run, Man, Run" in The Big Gundown and "Man for Me" in O.K. Connery — which appears throughout the film in a variety of arrangements. It is primarily used to communicate Eva's love for Diabolik, which is furthered by Alessandro Alessandroni's playing of a sitar during the bridge, suggesting Diabolik's criminality and relationship with Eva to be a form of enlightenment. A "chase theme" frequently used in action scenes prominently features a double-tracked electric guitar motif, also performed by Alessandroni, that bears similarity to that featured in Neal Hefti's "Batman Theme". Among the film's most experimental cues include the psychedelic discotheque theme, which utilizes "wall of sound" reverb to enhance (at alternating points) a vocal chorus and a brass section providing the melody over a rhythm section consisting of a fuzz guitar and drum kit, and the identikit theme, which includes an improvised performance on an atonal keyboard by Nicolai. Lucas deems the highlight of the score to be the cue featured when Diabolik and Eva recover the gold, beginning with a solo melisma performed by Edda Dell'Orso, which is replaced by a vocal chorus performed by Alessandroni's I Cantori Moderni choir and later by a rock band accompaniment that "feels closely allied to Morricone's Spaghetti Western work while also feeling perfectly at home in an espionage milieu". Although an Italian-language version of "Deep Down" was released by Parade as a 45 RPM single, the original score has never seen a full, authorized release, as the original master tapes were destroyed in the 1970s by a warehouse fire. This has resulted in several unauthorized reconstructions of the score being released on CD, the most widely distributed of which is a version attributed to Pallottola Foro, which also includes dialogue extracts from the film. In the March 2002 issue of GQs list of the "Top 10 Movie Soundtracks of All Time", Morricone's score was ranked third. Release Danger: Diabolik'''s release was highly anticipated in Italy, and this led to De Laurentiis threatening to sue producers of films whose titles were similar to his, such as Superargo Versus Diabolicus and Arriva Dorellik. Danger: Diabolik was submitted to the Italian Board of Censors in December 1967 and, after five brief cuts were made to the film, it was released in Italy on January 24, 1968. The film was described by film historian Roberto Curti as