Two Rode Together (1961)

For a fee, hard-drinking Texas marshal Guthrie McCabe (James Stewart) agrees to help Army officer Jim Gary (Richard Widmark) search for a group of whites who were abducted years earlier by Comanche warriors. After rescuing two of the abductees, McCabe and Gary find that the former captives have fully adopted the culture of their American Indian captors and are barely recognizable. Cultures collide as they attempt to return the settlers to their original -- and now long-forgotten -- lives.