And an updating of sorts of the Dumas novel, from Mascot Pictures and directors Colbert Clark and Armand Schaefer. The "musketeers" are soldiers in the French Foreign Legion: Clancy (Jack Mulhall), Renard (Raymond Hatton), and Schmidt (Francis X. Bushman Jr.). They are stationed in North Africa where they battle frequent Arab uprisings. During one such battle they are saved by American military pilot Tom Wayne (John Wayne). When Tom is later framed for murder by the insidious "El Shaitan", mysterious leader of the Devil's Circle, the three legionnaires promise to help Wayne is whatever way they can, leading to much high-flying mayhem, desert sands survival, and dangerous shoot-outs.
Despite the title, this is much more Wayne's show than the three legionnaires. Wayne is good at the action scenes, even if his character should be a complete wreck by the end, after multiple fist-fights, falls from great heights, and even being shot a few times. Both Chaney and Beery Juniors have early roles, and it was fun seeing them so young. The story gets repetitive (a drawback for many lesser serials), and I would have liked the three musketeers to have been featured more. The masked bad guy El Shaitan was physically performed by Yakima Canutt with a voice dub from Charles Middleton.