Pierre Fresnay as Professor Louis Delage

Renée Devillers as Florence Delage

Claire Duhamel as Catherine Delage

Marcel André as Doctor Charles Tannard

Nadine Alari as Yvette

Roland Alexandre as Jacques Brulages

Pierre Destailles as Gaston Berval

Michel Vadet as Doctor Larmy

Christiane Barry as Jacqueline

Georgette Anys as Mrs. Berval

Philippe Mareuil as Georges

Jean-Claude Pascal as Marcillac

Maurice Ronet as François

Claude Nicot as Barby

Madeleine Barbulée as Marie-Laure

Robert Moor as Professor Peccavi

Ky Duyen as Chang, butler

Émile Genevois as Gaston's friend

Raymond Galle as Doctor

Bernard Hubrenne as Student

Catherine Romane as Paulette

Georgette Talazac as Nurse

Claire Muriel as Patient

Christian Fourcade as Émile

Serge Lecointe as Young Albert

Elisa Lamotte as Lady of Orléans

Marguerite Garcya as Mrs. Martin

Tania Soucault as Jacky

Judith Magre as

Perrette Darbon as

Bernard Musson as Assistant to Doctor Delage (uncredited)

Julien Maffre as Patient (uncredited)

Jacques Monod as Gendarme (uncredited)

Dominique Marcas as (uncredited)

Frédérique Hébrard as (uncredited)

Nadine Bellaigue as (uncredited)

Anne Béranger as (uncredited)

Henri Doublier as (uncredited)

Maguy Horiot as (uncredited)

Alain Raffael as (uncredited)

Joëlle Robin as (uncredited)

Jean Thielment as (uncredited)