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With this film, the final American-produced motion picture serial, the once so powerful genre went out with a whimper. Starring a couple of nonentities -- Lee Roberts, a former bit-part player, and Dennis Moore, who had the dubious honor of also starring in the penultimate serial, Perils of the Wilderness (1956) -- the serial was produced by the notorious Sam Katzman and thus consisted mainly of overused stock footage with a few new scenes added for good measure. Roberts and Moore played an army scout and a pony express rider who come to the aid of settlers terrorized by a greedy rancher-turned-outlaw. If nothing else, the last American action serial offered brief employment for several veterans of the genre, including Reed Howes, Kermit Maynard, Al Ferguson, Harry Tenbrook, and the ever popular Bud Osborne.