First, in "The Man Behind the Gun," Randolph Scott portrays an undercover Army officer in 1850s Los Angeles who competes with a hotheaded fellow military man for the affections of a beautiful schoolteacher while investigating a separatist plot. WithPatrice Wymore, Dick Wesson. Next, "Thunder Over the Plains" has Scott starring as an Army captain whose loyalties are divided when he tries to prove a man's innocence. Lex Barker, Phyllis Kirk, Charles McGraw co-star. Then, "Riding Shotgun" featuresthe sagebrush icon dealing with vigilantes who think that he is a stagecoach robber. With Wayne Morris, Joan Weldon, Joe Sawyer. 4 hrs. total. Standard; Soundtrack: English DOlby Digital mono.