 American actor James Earl Jones guest starred in the episode as a moving man, Serak the Preparer (one of the aliens) and the narrator of "The Raven".Unable to work with the rest of the cast, Jones recorded his lines at the Village Recorder in West Los Angeles; he chewed on a cookie close to his microphone to perform drooling sounds for the aliens.The sibling aliens Kang and Kodos first appeared on the show on this episode.