The Long Arm

The Long Arm

Year: 1956

Runtime: 96 mins

Language: English

Director: Charles Frend

CrimeMysteryThriller

Scotland Yard detectives race to halt a wave of safe‑cracking burglaries sweeping England, starting with evidence uncovered at a recent London break‑in. The film adopts the gritty police‑procedural style popularized by Ealing’s 1950 classic The Blue Lamp, and was released in the United States under the title The Third Key.

Warning: spoilers below!

Haven’t seen The Long Arm yet? This summary contains major spoilers. Bookmark the page, watch the movie, and come back for the full breakdown. If you're ready, scroll on and relive the story!

Timeline & Setting – The Long Arm (1956)

Explore the full timeline and setting of The Long Arm (1956). Follow every major event in chronological order and see how the environment shapes the story, characters, and dramatic tension.

Time period

1950s

Set in postwar Britain, the story depicts a London in the 1950s, a period of rapid urban change and evolving policing. The detectives rely on legwork, surveillance, and cross-location coordination to piece together a nationwide series of safe-breakings. The era’s security practices and the use of genuine keys heighten the intrigue and stakes.

Location

Long Acre, Central London, Royal Festival Hall, London, North Wales, Scrapyard

The film unfolds across central London, with Long Acre anchoring the urban crime drama. Much of the action centers on the Royal Festival Hall, a major public venue that also becomes a backdrop for cash handling and high-profile gala nights. The investigation expands to North Wales and a nearby scrapyard, illustrating how the crime network operates beyond the capital.

🗺️ London 🕵️ Urban crime 🎭 Cultural landmarks

Last Updated: October 04, 2025 at 14:19

Main Characters – The Long Arm (1956)

Meet the key characters of The Long Arm (1956), with detailed profiles, motivations, and roles in the plot. Understand their emotional journeys and what they reveal about the film’s deeper themes.

Tom Halliday — Jack Hawkins

Supt Tom Halliday is a methodical and persistent leader who coordinates the nationwide investigation into the safe-cracking ring. He relies on steady judgment, cross-checking clues, and calm authority to guide his team.

🧭 Leadership 🕵️ Investigation

Detective Sergeant Ward

Ward is the younger, observant detective who partners with Halliday. He contributes quick thinking under pressure and supports the procedural approach that drives the investigation forward.

🧭 Teamwork 🕵️ Investigation

Gilson (Mr Gilson) — Richard Leech

A former key-maker turned mastermind behind the key duplications; he fakes his own death to evade capture and coordinates the thefts from behind a calm, calculating exterior.

🕵️ Mastermind 🗝️ Fraud

Mrs Gilson (Mrs Elliot) — Ursula Howells

Mrs Gilson is the wife who becomes entangled in her husband’s scam, playing a role in the deception that allows the thefts to continue.

🧩 Deception 🏷️ Cover

Creasey

A shipping-office figure tailed by investigators, representing the network of minor players who help move information and access to the safe locations.

🧭 Infiltration 🕵️ Investigation

Last Updated: October 04, 2025 at 14:19

Major Themes – The Long Arm (1956)

Explore the central themes of The Long Arm (1956), from psychological, social, and emotional dimensions to philosophical messages. Understand what the film is really saying beneath the surface.

🕵️ Investigation

A disciplined police investigation threads together disparate burglaries, tracing patterns and linking clues across cities. Halliday and Ward marshal time, surveillance, and interviews to build a coherent case against a clever fraudster. The partnership demonstrates professional diligence and collective problem-solving under pressure.

🔑 Deception

The criminals rely on forged keys and a staged persona to commit 14 safe-crackings with real keys. Gilson’s fake death and a network of trusted accomplices show how ordinary workers can orchestrate elaborate fraud. The plot turns on misdirection and the thin line between legitimate industry and criminal enterprise.

⚖️ Justice

Evidence accumulates through careful police work, car chase plots, and the eventual capture of Gilson and his wife. The climax links back to the original safe, sealing the case against those who exploited trust and security. The ending reinforces the city's rule of law and the detectives’ perseverance.

Last Updated: October 04, 2025 at 14:19

Mobile App Preview

Coming soon on iOS and Android

The Plot Explained Mobile App

From blockbusters to hidden gems — dive into movie stories anytime, anywhere. Save your favorites, discover plots faster, and never miss a twist again.

Sign up to be the first to know when we launch. Your email stays private — always.

Unlock the Full Story of The Long Arm

Don't stop at just watching — explore The Long Arm in full detail. From the complete plot summary and scene-by-scene timeline to character breakdowns, thematic analysis, and a deep dive into the ending — every page helps you truly understand what The Long Arm is all about. Plus, discover what's next after the movie.

The Long Arm Summary

Read a complete plot summary of The Long Arm, including all key story points, character arcs, and turning points. This in-depth recap is ideal for understanding the narrative structure or reviewing what happened in the movie.

The Long Arm Summary

The Long Arm Timeline

Track the full timeline of The Long Arm with every major event arranged chronologically. Perfect for decoding non-linear storytelling, flashbacks, or parallel narratives with a clear scene-by-scene breakdown.

The Long Arm Timeline

More About The Long Arm

Visit What's After the Movie to explore more about The Long Arm: box office results, cast and crew info, production details, post-credit scenes, and external links — all in one place for movie fans and researchers.

More About The Long Arm