Got boots, a hat and a horse? Then that’s probably Cassidy! Hopalong Cassidy was a cowboy hero that became one of the icons of America’s fictional stories in almost every medium (television, print, radio etc.). Its popularity began riding the radio industry through Mutual Broadcasting System in January 1950 and ran until 1952. This radio program often involves mystery and finding the identity of the culprit with the help of Cassidy.