Alone in the Night (French: Seul dans la nuit) is a 1945 French crime film directed by Christian Stengel, and starring Bernard Blier, Sophie Desmarets and Jacques Pills.

Strangely, during each of the crimes, a signature song of a famous popular singer is heard, at first by an eccentric old man.

The police inspector on his first case follows several leads around the entourage of the singer, and the daughter of a police commissioner through a radio show draws the chase through a nocturnal Paris, to a disused theatre where the assassin has lured his final victim.

The person originally chosen for the role of Jacques Sartory was André Claveau, but as he was still under a cloud due to his activities during the Occupation, the producers moved on to Jacques Jansen, known for opera and operetta, before finally casting Jacques Pills.

The film's sets were designed by the art director Robert Gys.