Trivia

When Chuck Norris was offered the lead role of the film, he was in the process of establishing a new kick-boxing league in Los Angeles with Benny Urquidez. Norris cites his decision to pursue the movie over the league as a defining point in his transition from martial arts competition to acting.

The film was part of a cycle of 1970s conspiracy movies. These included: Executive Action (1973), Klute (1971), Chinatown (1974), La blessure (1981), Un espion de trop (1977), Qui a tué le président? (1979), Conversation secrète (1974), À cause d'un assassinat (1974), Les 3 jours du Condor (1975), La Théorie des dominos (1977), Le commando des tigres noirs (1978), L'ultimatum des trois mercenaires (1977), Space Connection (1980), Capricorn One (1978), and Les Hommes du président (1976). Blow Out (1981) would follow in the early 1980s.

Chuck Norris' first film as a Vietnam veteran; it would later become the basis for his role in the Missing In Action films during the 1980s. Co-star Soon-Tek Oh would later co-star in Portés disparus 2 - Pourquoi ? (1985) as the film's villain.

Lloyd Haynes' final feature film.

Norris plays a character named Booker in this movie. Many years later, Norris starred in Expendables 2 : Unité spéciale (2012), playing another character named Booker.