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Commissaire Perrache, the chief of the D.S.T., the French domestic intelligence service, tries to neutralize a group of terrorists named the Partisans de la Métropole. He sends one of his best agents, inspector Louis Vignon, incidentally the husband of his charming secretary Lucette, on the trail of an illegal transmitter. But Vignon gets kidnapped by the gang and held captive on a boat off the shores of Monaco...
Charles Vanel
Commissioner Perrache of the D.S.T.
Anne Vernon
Lucette Vignon
Jacques Morel
Inspector Paul Duchamp
Maurice Teynac
Kurt Topfer
Henri Crémieux
Saab Astérich
Yves Massard
Inspector Louis Vignon
Robert Porte
Koskah
Marcelle Arnold
Lynda
Edmond Ardisson
Linda
Jean-Paul Coquelin
Technician from South Tunisian
René Havard
Technician from South Tunisian
Germaine de France
Mrs. Perrache
André Numès
Archivist
Philippe Olive
Journalist
Grégoire Aslan
Inspector Ben Hamman
René Blancard
Inspector Rentier
Marc Arian
Spectator at the cinema (uncredited)
Jean Dréville
Commentator (uncredited)
Pierre Duncan
Beefcake (uncredited)
Bob Ingarao
Radio technician (uncredited)
Julien Maffre
Monegasque policeman (uncredited)
Geneviève Morel
Lady in the cinema (uncredited)
Louis Viret
Jupiter, D.S.T. agent (uncredited)