In 1963, EON Productions producers Albert R. Broccoli and Harry Saltzman made an agreement with McClory to adapt the novel into the fourth James Bond film, also stipulating that McClory would not be allowed to make further adaptations of "Thunderball" for at least ten years after the release. Although SPECTRE and Blofeld were used in a number of films before and after "Thunderball", the issue over the copyright of "Thunderball" prevented SPECTRE and Blofeld from becoming the main villains in 1977's "The Spy Who Loved Me". In 1983, McClory released a film based on his Bond rights entitled "Never Say Never Again".