Cast
Sacha Guitry
Louis Pasteur
Maurice Schutz
Grandfather
José Squinquel
Émile Roux
Jean Périer
Doctor
André Marnay
Doctor
Pierre Labry
Doctor
Armand Lurville
The first witness
No Image
Camille Cousin
The second witness
Henry Bonvallet
Sadi Carnot, President of the Republic
Gaston Dubosc
President of the Academy of Medicine
François Rodon
Little Joseph Meister
Louis Maurel
Jules Guérin
Louis Gauthier
Poggiale
No Image
Pierre Athon
Student
Pierre Huchet
Servant (uncredited)