White Comanche [1968]

William Shatner stars as warring twin brothers in this action-packed western. Drifting cowboy Johnny Moon (Shatner) is forced to defend the town of Rio Honcho when his tribal Indian twin brother Notah (also Shatner) has the drug-induced revelation that he must lead the Comanche Nation in a war against the whites. With Rio Honcho, led by Sheriff Logan (Joseph Cotten), already at breaking point Johnny must first defeat his peyote-loving brother before he can save the rest of the townspeople who are demanding his help.