Before television existed, radio was king, and Groucho and Chico Marx made their radio debut in 1934 with "The Marx Brothers Show," where they portrayed Hollywood agents. This video also includes Groucho's guest appearances on various 1940s radio programs, highlighting his interactions with stars such as Lucille Ball, Bing Crosby, Johnny Weismuller, Al Jolson, Ida Lupino, Betty Grable and more.