Lionel Meadows is a London garage owner who deals in stolen cars. Meadows buys log books from scrapped models, then has other cars corresponding to the log books stolen and the number plates replaced. He gives a list of cars to young petty thief Tommy Towers, which includes a 1959 Ford Anglia. The car Tommy steals belongs to struggling cosmetics salesman John Cummings, who needs the car to keep his job but who could not afford to insure the car against theft. Desperate to recover it, Cummings learns that he is going to lose his job to a younger colleague.

Alerted to Tommy by a street newspaper vendor, Alfie, who witnessed the crime, Cummings starts investigating the activities of Meadows and his associates. Meadows, disturbed by his inquiries, first brutalises Tommy and then Alfie, who, demeaned and broken, commits suicide.

Meadows discovers Cummings breaking into his garage and has him beaten up, yet Cummings persists in his attempts to recover his car, even after being warned off by police. It emerges that, since his demobilisation from the army, Cummings has failed at several enterprises because of poor judgement and a lack of persistence. At work, he reacts violently to his younger replacement and summarily quits.

Cummings eventually finds the weak link in Meadows's operation: his mistress Jackie, a teenage runaway who was once Tommy's girlfriend but whom Meadows continually threatens and abuses. Cummings takes Jackie under his wing, but Meadows invades Cummings's flat and threatens Jackie and the Cummings family. Though formerly supportive, Mrs. Cummings threatens to take their children and leave her husband if he goes after Meadows.

Jackie goes back to Tommy, whom Meadows has attacked yet again, then calls Cummings to tell him that she and Tommy will give him evidence against Meadows. The police are less interested in recovering Cummings's car than in making a major case against Meadows and his car theft ring. Cummings, who has vowed not to give up, decides to take matters into his own hands, while Meadows is obsessed with keeping the stolen Ford and killing Cummings. He lies in wait for Cummings, who again breaks into the garage. This time Cummings is the winner in a bloody fight, and the police, called by Tommy and Jackie, arrest Meadows. The battered Cummings drives home to find the flat empty, but his wife returns and embraces him.

The idea for the film began when director John Guillermin had his car stolen. He mentioned it to the producer, Peter de Serigny, and they discussed what would happen if your livelihood was completely dependent on a car that had been stolen. They developed a story outline which they gave to writer Alun Falconer to turn into a script.^[4]

Filming began November 1959 with shootting on location in London. Much of the action takes place in Chichester Place, Paddington.^{[citation needed]}

Carol White says that during filming she had affairs with Adam Faith, Richard Todd and Peter Sellers.^[5] Sellers was reportedly first offered the role of Cummings but asked to play the head criminal.^{[citation needed]}

The Monthly Film Bulletin wrote (1963):

"A short synopsis cannot hope to do justice to the sadistic impulse that appears to have guided John Guillermin through this unlovely exercise. From the initial finger-crushing lesson that Meadows offers Towers, to the final finger-crushing door slam that Meadows catches from Cummings, Never Let Go runs full circle through every type of violence this side of an X-certificate. Obtrusive shock-cutting, exaggerated camera angles, and a selfconsciously strident use of "adult" language all serve to accentuate the essential falsity of the characterisations, and to advertise Never Let Go as a product of the new "traumatic" school of independent British film-making. Peter Sellers almost succeeds in establishing the ruthless car dealer as a study of a twisted personality, almost fascist in his objective brutality; but this role, like Richard Todd's oddly appealing salesman, with his fake horn-rimmed spectacles and his nervous laugh, is quickly sacrificed to the demands of a script which, if it offers more than a frame for violence with undertones of the now fashionable criticism of police methods, makes a strong plea for comprehensive car insurance.^[6]

A 1963 review of the film in The New York Times was unfavourable, describing Sellers "grinding his way through the rubble of a drearily routine plot" and attributed his performance in the film, different from his usual comedic roles, to "That itch to play Hamlet, I suppose; a desire to change his pace, which Mr. Sellers has often proclaimed he likes to do".^[7]

Britmovie noted that "John Guillermin's direction is taut and has a degree of flair."^[8]

Time Out wrote: "Cosmetics salesman Todd has his car stolen and, without insurance or much assistance from the police, decides to track it down himself. The trail leads through youthful thug Faith to gang boss Sellers (taking a rare tilt at a villainous role) in this stolid homegrown crime caper, considered very brutal in its day, with a self-consciously strident use of 'adult' language. Quite persuasive turns from Todd and Sellers."^[9]

Filmink said: "It’s a gripping crime tale, with modest ambitions but made with terrific pace by Guillermin."^[10]

Never Let Go was released to DVD by MGM Home Video on 7 June 2005, as a Region 1 fullscreen DVD.^{[citation needed]}

• Never Let Go at IMDb  
• Never Let Go at Rotten Tomatoes
• Never Let Go at the BFI's Screenonline
• Never Let Go then-and-now location photographs at ReelStreets