Loiseau the pharmacist mistakenly mixes potassium cyanide into a batch of cough syrup and sells five bottles. With horror he discovers his mistake and sets out to find the buyers. He finds only four. The fifth, not a regular customer, comes back to the pharmacy...
Pharmacist Adrien Loiseau
Ceccaldi
Young bride
Loiseau's stepfather
Horsewoman
Gossip
Ceccaldi son
Young groom
Philippe Chauvieux
Catcher
Alfred Bouchard
Flora
Dwarf
Circus employee
Canon
Flora's husband
Circus artist
Jean-Baptiste Chauvieux
Newspaper seller
Employee at the station (uncredited)