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 George Spenton-Foster Production Isaac Asimov Writing John Gorrie Directing Irene Shubik Production Jeremy Paul Writing