 In the original draft of the script, the TV stations call sign was  WJAS, the call sign of an actual radio station in Pittsburgh,  Pennsylvania, where the film was shot. The call sign was replaced  with WGON, which was not issued to any station at that time (it had  been issued to an AM radio station in Munsing, Michigan, but the  station had gone dark some time before). WGON has now been issued to  a licensed low power FM radio station (WGON