War of the Coprophages featured insect-like robots designed by roboticist and author Rodney Brooks. Morgan was also inspired by Orson Welles's 1938 radio broadcast of H.G. Wells's book "The War of the Worlds" (which had caused mass hysteria), with the episode's title being a direct reference to the novel (with the last part of the episode's title, "coprophages", referring to a dung eater). The town featured in this episode also takes place in—Miller's Grove—is a play on Grover's Mill, the setting of Orson Welles's 1938 radio adaptation. Originally, a scene featuring the sheriff discussing a noted case of hysteria from the 1930s was planned
The Orson Welles Almanac Welles brought together for the show were an important force in the revival of traditional New Orleans jazz in the 1940s. ""The Orson Welles Almanac" was a format that intrigued Welles throughout the early 1940s," wrote radio historian John Dunning. "It consisted of everything from odd facts to jazz." The idea of doing such a variety show occurred to Welles after his success as substitute host of "The Jack Benny Program", radio's most popular show. When Jack Benny contracted pneumonia on a performance tour of military bases, Welles hosted four consecutive programs (March 14–April 4, 1943) and was Benny's first