Michel Ferréol reluctantly meets up with an old school friend, Antoine Fiesco. Michel didn’t like Antoine much when they were at school and tries to get away by making an excuse. He changes his mind when Antoine introduces him to his wife, a beautiful brunette named Christine.
Unfortunately the movie It Happened All Night is not yet available on HBO Max.
| Directing | Henri Verneuil | Director |
| Directing | Michel Wyn | Assistant Director |
| Production | Fred Surin | Production Manager |
| Production | Christine Gouze-Rénal | Producer |
| Camera | Robert Lefebvre | Director of Photography |
| Editing | Léonide Azar | Editor |
| Sound | Antoine Archimbaud | Sound |
| Sound | Martial Solal | Music |
| Art | Robert Clavel | Production Design |
| Writing | Henri Jeanson | Screenplay |
| Writing | Jean Aurenche | Screenplay |
| Writing | Alain Moury | Novel |
| Writing | Henri Jeanson | Dialogue |
