The Big Store, 1941, is a Marx Brothers comedy film in which Groucho, Chico and Harpo work to save the Phelps Department Store, owned by Martha Phelps (Margaret Dumont). Groucho plays detective Wolf J. Flywheel, a character name originating from the Marx-Perrin radio show Flywheel, Shyster, and Flywheel in the early 1930s. (Photo by: Universal History Archive/UIG via Getty images).