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The Three Mesquiteers ride again in the economical Republic sagebrusher Purple Vigilantes. The Mesquiteers in question are Stony Brooke, Tucson Smith and Lullaby Joslin, played this time out by Robert Livingston, Ray "Crash" Corrigan and Max Terhune. The storyline is a timely one, inspired by the terrorist activities of the bigoted "White Legion" of the mid-1930s. When a group of hooded mercenaries begin to wreak terror on the frontier, the Mesquiteers ride to the rescue. Their mission is a personal one: their old friend and mentor has been falsely accused of being the head of the Purple Vigilantes. Worth noting is that the Vigilantes are depicted as having once been an honorable organization, now re-formed for evil instead of good.