Scarlet Thread is a 1951 British second feature ('B') crime drama film directed by Lewis Gilbert and produced by Ernest G. Roy. It was written by Moie Charles and A.R. Rawlinson.
Two criminals plan a jewellery robbery. The robbery goes wrong and an innocent man is shot.
The film was made at Nettlefold Studios, Walton-on-Thames in Surrey, England, and on location.
The Monthly Film Bulletin wrote: "Sydney Tafler and Laurence Harvey do well as the unattractive pair of gangsters, and the characterisation and dialogue are as a whole more effective than the improbable story."
Kine Weekly wrote: "Well-made, if slightly far-fetched romantic melodrama ... Unusual and intriguing story, exciting climax, feminine angle, and quota."
In The Radio Times Guide to Films Allen Eyles gave the film 2/5 stars, writing: "In one of his early leading roles, Laurence Harvey working with Alfie director Lewis Gilbert gives this downbeat British crime drama some modest interest. Harvey is convincingly unpleasant as the skirt-chasing spiv and petty criminal with a sleazy charm, who panics and kills a bystander during a jewel robbery. But the twist in the tale is more implausible than ironic."