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
- 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
- Pierre Athon Student
-
Pierre Huchet
Servant (uncredited)
-
Camille Beuve
Joseph Lister (uncredited)
-
Julien Bertheau
Student (uncredited)
- Gaston Allain Student (uncredited)
- Félix Clément Student (uncredited)
- Jean Francey Student (uncredited)
- Pierre Monda Little boy (uncredited)
-
Charles Vissières
Frémy, old doctor (uncredited)