In the second episode of the trilogy Fantômas kidnaps distinguished scientist professor Marchand with the aim to develop a super weapon that will enable him to menace the world. Fantômas is also planning to abduct a second scientist, professor Lefebvre.
Fantômas se déchaîne is a 1965 film starring Jean Marais as the arch villain Fantômas opposite Louis de Funès as the earnest but outclassed commissaire Juve and the journalist Fandor, also played by Marais. It was France's answer, with the Fantômas trilogy starting in 1964, to the James Bond phenomenon that swept the world at around the same time. It is the second in the trilogy of Fantômas films, that became extremely successful in Europe and Soviet Union and found success even in the United States and Japan. In this film Jean Marais also plays professor Lefebvre.