Deadly Strangers (also known as Silhouettes) is a 1975 British psychological thriller film directed by Sidney Hayers and starring Hayley Mills, Simon Ward and Sterling Hayden.

A motorist stops at a telephone box, gets out to make a call, and his unattended car is stolen by an unseen thief who runs over the owner, killing him.

The next day a man in his thirties, Stephen Slade, notices an attractive young woman, Belle Adams, in a pub, and when she is given a lift by a lorry driver, he follows her in his own car, which is the same colour and make (an Austin Maxi) as seen in the earlier murder scene.

[5] The Monthly Film Bulletin wrote: "Red herrings (and there are shoals of them in Deadly Strangers) are a perfectly valid thriller device, as Hitchcock has frequently shown.

But the withholding of essential plot information that is readily available to all the characters is bare-faced cheating, and in this respect, Sidney Hayers' inflated TV time-passer is guilty of something akin to criminal fraud.

Not that it matters a great deal, since the film's outcome is so evident from the first five minutes that all subsequent scenes serve only to highlight and compound the improbability of the principal characters' behaviour.

"[6] Time Out noted "old-fashioned psychopathic goings-on in the West Country" and its "sole redeeming feature is Hayley Mills, who suggests an actress capable of much better things than she has been offered recently.