The Murderer Lives at Number 21 (1942) Characters, Setting & Themes Explained

The film is set in Paris, France, with much of the action unfolding at a boarding house located at 21 Avenue Junot. This cramped building with its quirky tenants serves as a microcosm of the city's darker side, where secrets are whispered and alibis crumble.

• paris
• avenue junot
• boarding house
• setting
• location

The boarding house is a cramped building home to eccentric tenants, each harboring secrets. It becomes the focal point of the investigation, emphasizing the contrast between the characters' surface charm and the danger lurking beneath. The setting blends the charm of Parisian boarding house life with the tension of a crime mystery.

• boarding house
• avenue junot
• tenants
• paris setting
• mystery location

The film centers on three intertwined themes: Mystery, as Inspector Wens hunts a serial killer using clues and deduction; Deception, where every tenant presents a façade of innocence while concealing secrets; and Puzzle, as multiple killers collaborate to create alibis, turning the solution into a complex social puzzle.

• themes
• mystery
• deception
• puzzle
• investigation

Deception is central to the narrative - every tenant at the boarding house hides behind a facade of innocence while concealing darker secrets. The suspects' alibis are crafted to mislead investigators, blurring the lines between performance and crime. Inspector Wens must read between the lines as misdirection escalates throughout the investigation.

• deception
• alibis
• misdirection
• tenants
• facade

Commissaire Wens (played by Pierre Fresnay) is a precise and patient detective who uses disguise and cunning to navigate a roomful of quirky suspects. He relies on logical deduction and cool composure to separate truth from bluff, driving the story forward with his commitment to solving the case.

• commissaire wens
• inspector
• detective
• pierre fresnay
• protagonist

Mila Malou (played by Suzy Delair) is a ditzy singer chasing publicity who nonetheless contributes to the investigation through bold actions and timely hints. She mixes flirtation and manipulation, creating misdirection that complicates Wens's pursuit. Her charm masks a pragmatic, self-interested streak that keeps the case lively.

• mila malou
• suzy delair
• singer
• investigation
• character

Monsieur Colin (played by Pierre Larquey) runs a small business making and selling Durand dolls with blank faces, embodying the boarding house's oddball atmosphere. He can be clever and evasive, and his role in the murders becomes a key piece of the puzzle. His dolls symbolically represent the theme of facades masking intent.

• monsieur colin
• durand dolls
• blank faces
• boarding house
• dolls

The killer signs each crime with the Durand card, turning ordinary conversations into a tangled puzzle. This signature becomes a crucial clue that Inspector Wens follows throughout the investigation, linking the seemingly unrelated murders and adding a layer of theatricality to the crimes.

• durand card
• signature
• killer
• mystery clue
• crime

The boarding house harbors an eccentric cast of suspects including: Professor Lalah-Poor, a self-styled fakir and stage magician; Dr. Linz, a former abortionist turned doctor; and Kid Robert, a blind former boxer. Each tenant presents a façade of innocence while concealing secrets, making them all potential suspects in the murder investigation.

• suspects
• tenants
• boarders
• professor lalah-poor
• dr. linz
• kid robert

The Murderer Lives at Number 21 blends Thriller, Mystery, and Comedy genres. While the serial killer plot creates tension, the film incorporates screwball comedy elements through its eccentric character ensemble and the presence of a glamorous, publicity-seeking singer. The tone balances dark subject matter with lighthearted, whimsical touches.

• genre
• thriller
• mystery
• comedy
• screwball
• tonal balance