The Big Diamond Robbery

Tom Mix stars as Tom Markham, a daring cowboy hired to track down a priceless diamond stolen from a wealthy collector by a gang of ruthless criminals. The film follows his perilous journey through 1920s Arizona, featuring high-speed chases on horseback, gunfights, and daring stunts. Along the way, Tom crosses paths with various colorful characters, including Kathryn McGuire as Ellen Brooks, who joins him on his mission. With its fast-paced action sequences and praise for Mix's performance, The Big Diamond Robbery was well-received by critics upon its release in 1929.