"The Man From Button Willow" was released in the spring of 1965, but the copyright at the end of the film suggests that it could've been out sooner. That is, two years sooner. By the time it was released, star Dale Robertson was a year away from Iron Horse.
Robertson not only introduces the movie, but co-wrote some of the music, and has the lead as Justin Eagle, a government agent assigned to Button Willow. Our supporting cast includes Thurl Ravenscroft as the preacher, Howard Keel, and Edgar Buchanan (Petticoat Junction).
United Screen Arts, by the way, was Robertson's production company. I have no memory of this film having been on television. A pity.