Jean Lefebvre
Eugène Ballanchon, scientific researcher, single
Acting
Maria Latour
Régine, Mr. Beauchard's spy
Acting
Bernard Blier
Mr. Beauchard, executive secretary linked to a gang
Acting
Michel Serrault
Mr. Granger, director of the scientific laboratory
Acting
Pierre Tornade
DST inspector
Acting
Pierre Brasseur
Father Ballanchon
Acting
Margo Lion
Mrs. Ballanchon, Eugène's mother
Acting
Robert Dalban
Merchant, spy in the laboratory
Acting
Mario David
Mario
Acting
Paul Préboist
Police officer
Acting
Henri Virlogeux
Scholar
Acting
André Chaumeau
Baron
Acting
Jean Franval
DST inspector
Acting
Paul Préboist
Agent
Acting
Alain Janey
Fred
Acting
Sabine Sun
Baroness
Acting
Yvon Sarray
Pedestrian
Acting
Max Arian
Extra worker (uncredited)
Acting
André Cagnard
Jo (uncredited)
Acting
Guy Delorme
Actor from the western (uncredited)
Acting
Marius Gaidon
Police officer (uncredited)
Acting
Henri Guégan
Actor from the western (uncredited)
Acting
Jean Ozenne
Minister (uncredited)
Acting
Laure Paillette
Traveler (uncredited)
Acting
Lionel Vitrant
Actor from the western (uncredited)
Acting