Diamonds Are Forever is a 1971 spy film and the seventh film in the James Bond series produced by Eon Productions. It is the sixth and final Eon film to star Sean Connery, who returned to the role as the fictional MI6 agent James Bond, having declined to reprise the role in On Her Majesty's Secret Service (1969). The film is based on Ian Fleming's 1956 novel and is the second of four Bond films directed by Guy Hamilton. The story has Bond impersonating a diamond smuggler to infiltrate a smuggling ring and uncovering a plot by his old enemy Ernst Stavro Blofeld to use the diamonds to build a space-based laser weapon.