Jean Lefebvre

Eugène Ballanchon, scientific researcher, single

Maria Latour

Régine, Mr. Beauchard's spy

Bernard Blier

Mr. Beauchard, executive secretary linked to a gang

Michel Serrault

Mr. Granger, director of the scientific laboratory

Pierre Tornade

DST inspector

Pierre Brasseur

Father Ballanchon

Margo Lion

Mrs. Ballanchon, Eugène's mother

Robert Dalban

Merchant, spy in the laboratory

Mario David

Mario

Henri Virlogeux

Scholar