Range War (1939)
Westerns formed a major part of series productions. The Hopalong Cassidy series starred William Boyd (1898–1972) as Hopalong Cassidy with his sidekick California Carlson (Andy Clyde, 1892–1967) and his horse Topper. Both Paramount Studios and United Artists released a total of sixty-six episodes from 1935 to 1948, making it one of the longest-running series in Hollywood history.
Range War was the 26th movie of the series. In the film, Russell “Lucky” Hayden (1912–1981) replaces California Carlson as Cassidy’s sidekick. The two go undercover to expose a group of local ranchers who attempt to sabotage the construction of a railroad through the open frontier.