Tintin is sent to guard Professor Calculus, who has invented a machine that can duplicate anything, and is staying in a village near the border of Syldavia and Bodouria. Rastapopoulous, an infamous and ruthless international criminal, tries to lure Calculus and Tintin away by kidnapping two children, who live nearby, in order to get his clutches on the machine.
Jacques Careuil
Claude Bertrand
Micheline Dax
Serge Nadaud
Guy Piérauld
Paul Rieger
Jacques Vinitzki
Marie Vinitzki
Henri Virlogeux