크레딧 출연 Tom Baker The Doctor Elisabeth Sladen Sarah Jane Smith Ian Marter Harry Sullivan Wendy Williams Vira Kenton Moore Noah Richardson Morgan Rogin John Gregg Lycett Christopher Masters Libri Stuart Fell The Wirrn Nick Hobbs The Wirrn Gladys Spencer High Minister (voice) Peter Tuddenham Voices on Nerva (voice) 스텝 Robert Holmes Writing Rodney Bennett Directing Philip Hinchcliffe Production Barbara Kidd Costume & Make-Up Roger Murray-Leach Art Dudley Simpson Sound Sylvia James Costume & Make-Up Marion McDougall Production Robert Holmes Writing Dick Mills Crew Nigel Wright Lighting John Lloyd Sound John Friedlander Visual Effects Tony Oxley Visual Effects