First, in "Range Defenders," the Three Mesquiteers attempt to save some sheepherders who are being driven off their land by a greedy land baron. Bob Livingston, Ray Corrigan and Max Terhune star. Then, the Mesquiteers return to stop some evil rustlers from stealing a prized stallion, in "Wild Horse Rodeo." Livingston, Corrigan and Terhune star; look for Roy Rogers (billed as Dick Weston) in a small singing role. 106 min. total. Standard; Soundtrack: English. Plays All Regions.