Captain Midnight was developed at the Blackett, Sample and Hummert advertising agency in Chicago, Captain Midnight began as a syndicated show in 1938, airing through the spring of 1940 on a few Midwest stations, including Chicago's WGN. In 1940, Ovaltine, a product of The Wander Company, took over sponsorship. With Pierre Andre as announcer, the series was then heard nationally on the Mutual Radio Network where it remained until 1942. It moved to the Merchandise Mart and the NBC Blue Network in September 1942. When the U.S. Government broke up the NBC Red and Blue Networks, Ovaltine moved the series back to Mutual, beginning September 1945, and it remained there until December, 1949.