Whoa, Nellie! It’s time to call in the "calf-valry" as the Wild West C.O.W.-Boys of Moo Mesa ride into their rip-roarin’ finale—and finally uncover the true identity of the mystery villain Dark Horse! A horse is a horse, of course . . . unless that horse is the mysterious outlaw known only as Dark Horse, the steampunk-fueled menace bent on mutating the innocent townsfolk of Cowtown! Now, in their very first team-up, Marshal Moo Montana, Dakota Dude, and the Cowlorado Kid have saddled up to bring this rogue to justice. But hold your horses—this equestrian enemy may not be what he seems! Rising star writer Matt Hotson (Power Rangers: The Return) and artistic maverick Juan Gedeon (DC: The Jurassic League) lay down the law in the finale to the year’s "most-wanted" miniseries!