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 Show (radio series) crew, "The Orson Welles Show" featured music by Bernard Herrmann and a regular cast that included Conrad Binyon, Hans Conried, Dolores del Río, Brenda Forbes and Blanche Yurka. On many of the shows, Cliff Edwards recreated the voice of Jiminy Cricket and bantered with Welles between segments. Most of the series was produced while Welles was shooting his second feature film, "The Magnificent Ambersons" (October 28, 1941 – January 31, 1942), and many of the cast participated in "The Orson Welles Show". On January 6, 1942, Welles also began filming "Journey into Fear". The November 17, 1941, broadcast marked the