Relentless is a 1948 American Western film directed by George Sherman and starring Robert Young and Marguerite Chapman in the main roles.

The film was based on the story, "Three Were Thoroughbreds," by Kenneth Perkins, originally published in the June 1938 issue of Blue Book and then as a hardcover novel in 1939.

At the local saloon, prospectors Len Briggs and Bob Pliny brag about finding gold at their mine.

Bad guys Tex Brandaw and Jim Rupple decide to follow the two prospectors and steal their mine.

Drifter Nick Buckley, who is passing through town seeking shelter for his pregnant mare, is offered a drink by the two old prospectors, on the account of their recent good fortune.

Tex has witnessed the gunfight and, pretending he's a passerby, assures Nick that he will back up his story of self-defense in front of the sheriff.