Lettre ouverte
Martial, Colette 's husband, is madly jealous. One day, he catches his wife writing a letter and he does want to know what this message contains, to no avail.

Martial Simonet

Colette Simonet

Gaston

Honoré, the father-in-law

Madame Pépin, the concierge

Hortense, the maid

Monsieur Pépin, the cop

A tenant

Madame Gallot, the old tenant
The gallant gentleman

Henriette

Monsieur Lesage
Laurence, the mother-in-law
The inspector (uncredited)

The flirt in the street (uncredited)

The cafe owner (uncredited)

A tenant (uncredited)
The old lady (uncredited)

The black (uncredited)

(uncredited)
(uncredited)

A lady (uncredited)

The painter (uncredited)

The fat lady (uncredited)
The old gentleman (uncredited)

A tenant (uncredited)
A tenant (uncredited)

(uncredited)

The driver (uncredited)