크레딧 출연 George Benson Arnold Potterley James Maxwell Jonas Foster David Langton Thaddeus Araman Willoughby Goddard Ralph Nimmo Sylvia Coleridge Caroline Potterley Shirley Cain Miss Clements Frances Alger Laurel 스텝 John Gorrie Directing Isaac Asimov Writing Jeremy Paul Writing Irene Shubik Production George Spenton-Foster Production