Jean Lefebvre

~ as ~

Eugène Ballanchon, scientific researcher, single

Maria Latour

~ as ~

Régine, Mr. Beauchard's spy

Bernard Blier

~ as ~

Mr. Beauchard, executive secretary linked to a gang

Michel Serrault

~ as ~

Mr. Granger, director of the scientific laboratory

Pierre Tornade

~ as ~

DST inspector

Pierre Brasseur

~ as ~

Father Ballanchon

Margo Lion

~ as ~

Mrs. Ballanchon, Eugène's mother

Robert Dalban

~ as ~

Merchant, spy in the laboratory

Mario David

~ as ~

Mario

Henri Virlogeux

~ as ~

Scholar