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Community reviews
From TMDb members · 2 total- John Chard7/10
What I create. I can destroy. Night Key is directed by Lloyd Corrigan and adapted to screenplay by Jack Moffitt & Tristam Tupper from a story by William A. Pierce. It stars Boris Karloff, Jean Rogers, Warren Hull and Samuel S. Hinds. Music is by Louis Forbes and cinematography…
- JPV8526/10
Fun if not ultimately forgettable 1930s crime thriller that is certainly one of Karloff's lesser movies, however it's watchable enough, I suppose. **3.0/5**
Full text & links on TMDb in the reviews section below.
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Night Key
“HE MADE HIS ENEMIES BEG FOR MERCY!”
62%
Movie
1h 8m
AI Analysis
Night Key (1937) — AI movie analysis
WatchMind AI generated this AI analysis of Night Key (1937) — a movie tagged as Science Fiction and Crime with balanced tone moods and fast-paced pacing.
Story & themes: The inventor of a new top-of-the-line burglar alarm system is kidnapped by a gang in order to get him to help them commit robberies. Our models also surface themes such as identity, conflict, and relationships from synopsis and genre signals.
Watch context: Best suited for solo focused viewing. Expect fast-paced storytelling (~68 min).
Community signal: TMDb members rate Night Key 62% (34 votes) — solid community ratings for this movie.
AI verdict
Use this AI analysis as a quick read on Night Key before you watch — trailer, TMDb reviews, and licensed streaming links on this page help you decide.
Algorithmic AI analysis from genres, synopsis, pacing heuristics, and TMDb community scores — not a generative chatbot. How WatchMind works.
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TMDb audience score
62%
from 34 TMDb votes
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Synopsis
The inventor of a new top-of-the-line burglar alarm system is kidnapped by a gang in order to get him to help them commit robberies.
Quick facts
- Type
- Movie
- Status
- Released
- Release date
- 1937-04-18
- Runtime
- 1h 8m
- TMDB rating
- 6.2
- TMDB ID
- 28045
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Frequently asked questions
Where can I watch Night Key (1937)?
Night Key is available for discovery on WatchMind. You can find official links to rent, buy, or stream from licensed digital stores like Apple TV and Amazon in our "Where to Watch" section.
Is there an official trailer for Night Key?
Yes, you can watch the official trailer for Night Key directly on this page. We pull the latest video metadata from TMDb and play it via YouTube integration.
What is Night Key about?
The inventor of a new top-of-the-line burglar alarm system is kidnapped by a gang in order to get him to help them commit robberies.
Is there an AI analysis for Night Key?
Yes. WatchMind publishes an AI analysis on this page — tone, pacing, audience fit, and community scores from TMDb metadata and recommendation models (not a chatbot). Scroll to the AI Analysis section or read the meta description summary.
How long is the movie Night Key?
The official runtime for Night Key is approximately 68 minutes.
Cast & crew
Names and photos from The Movie Database (TMDb). Follow links on themoviedb.org for full filmographies.
Directors & writers
Cast

Boris Karloff
David Mallory

Warren Hull
Jim Travers

Jean Rogers
Joan Mallory

Alan Baxter
John Baron aka The Kid

Hobart Cavanaugh
Petty Louie

Samuel S. Hinds
Steven Ranger

David Oliver
Mike Callahan

Ward Bond
Fingers

Frank Reicher
Carl - gang engineer

Edwin Maxwell
Lawyer Kruger

George Cleveland
Sam Adams - Company Engineer (uncredited)
- R
Ruth Fallows
Waitress (uncredited)

George Humbert
Mr. Spinelli (uncredited)
- N
Nina Campana
Mrs. Spinelli (uncredited)

Charles C. Wilson
Police Capt. Wallace (uncredited)

Chuck Hamilton
Policeman (uncredited)
Audience notes
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Community reviews
Written by TMDb members — same catalogue as our movie & TV metadata. API terms
What I create. I can destroy. Night Key is directed by Lloyd Corrigan and adapted to screenplay by Jack Moffitt & Tristam Tupper from a story by William A. Pierce. It stars Boris Karloff, Jean Rogers, Warren Hull and Samuel S. Hinds. Music is by Louis Forbes and cinematography by George Robinson. Plot sees Karloff as aging inventor David Mallory, who once again finds himself cheated by security business boss Stephen Ranger (Hinds). With his eyesight failing and a daughter (Rogers) he wants to set up before he passes on, Mallory decides to teach the scheming Ranger a lesson. However, the criminal element headed by The Kid (Alan Baxter) have designs on using Mallory and his "Night Key" device for their own ill gotten gains. Well Louis! We are in. Out of Universal Pictures, Night Key was knocked out in under a month and budgeted, unsurprisingly, on the cheap. Yet the film belies these matters to be a good old fashioned yarn for entertainment. Melodrama mixes with a touch of sci-fi as the story unfolds as an interesting character piece, the veins of which are mostly pumped by an honest versus dishonest theme. Within there's a burgeoning romance etched in to the narrative, but this is handled well by the director as it aids the flow and reason of plotting, while the odd bit of action here and there stops the film from being too staid. The effects from John P. Fulton, too, are good fun and leave a favourable mark late in the story. Picture gets most of its strength from Karloff's performance. An undervalued talent at the best of times, Night Key gives viewers the chance to see just what he could do away from the horror iconography that defined his career. Here as the sombre and fragile David Mallory, Karloff isn't just looking the part because of make-up, he is able to match his body to the aged state of the character, simultaneously garnering great empathy from the viewers. It's a character, courtesy of performance, that firmly has us rooting for against the baddies. Around Karloff are effective turns from Rogers (bright), Hinds (weasel like), Hobart Cavanaugh (fun as the comedy side-kick, Petty Louis) and Ward Bond, who as henchman thug is an imposing presence. It's all very daft and goes where we expect, and want, it to go, but with Karloff leading the way this is a comfortably recommended time filler. 7/10
Fun if not ultimately forgettable 1930s crime thriller that is certainly one of Karloff's lesser movies, however it's watchable enough, I suppose. **3.0/5**
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