The Billy the Kid series of 42 western films was produced between 1940 and 1946, and released by Poverty Row studio Producers Releasing Corporation.
The initial six star Bob Steele as Billy the Kid, the next thirteen star Buster Crabbe as Billy the Kid, and the following 23 feature Crabbe as the same character, renamed "Billy Carson". All 42 films in the series are directed by Sam Newfield, "America's most prolific sound film director", sometimes under pseudonyms. All films feature Al St. John as Billy's sidekick.