크레딧 출연 Tom Baker The Doctor Mary Tamm Romana John Leeson K-9 (voice) John Woodvine Marshal Lalla Ward Princess Astra Davyd Harries Shapp Ian Saynor Merak Ian Liston 'Hero' Susan Skipper 'Heroine' John Cannon Guard Iain Armstrong Technician Pat Gorman Pilot Harry Fielder Guard William Squire The Shadow Barry Jackson Drax Valentine Dyall The Black Guardian 스텝 Michael Hayes Directing Graham Williams Production Bob Baker Writing Dave Martin Writing Anthony Read Writing David Maloney Production Dudley Simpson Sound Douglas Adams Writing