
Dr. Cordelier, living in a suburb of Paris, withdraws from society to pursue research into the functioning of the human brain. His lifelong friend, Maître Joly, becomes concerned when Cordelier draws up a will that bequeaths his entire estate to a stranger, Monsieur Opale; he cannot understand why Cordelier defends him, considering Opale attacks women and children. After a colleague is killed, Joly confronts Cordelier and discovers the truth behind his friend's behavior.
Dr. Cordelier / Opale

Joly

Dr. Lucien Severin

Little Girl Attacked by Opale
Commissioner Lardaut
Inspector Salbris
Boss of the Short-Time Hotel

First Passer-By during the Aggression

Second Passer-By during the Aggression

Neighbor
Little Girl's Mother
Désiré, Butler

Marguerite
First Girl
Alberte

Suzy
Juliette

Georges, Chauffeur

Mary, Maid

Cripple

Ambassador

Ambassador’s Wife

Blaise, Gardener

Camille
Annie
Lise
Madame des Essarts
Françoise