크레딧 출연 Peter Davison The Doctor Matthew Waterhouse Adric Sarah Sutton Nyssa / Ann Talbot Janet Fielding Tegan Jovanka Michael Cochrane Lord Cranleigh Barbara Murray Lady Cranleigh Gareth Milne The Unknown / George Cranleigh Moray Watson Sir Robert Muir Ivor Salter Sergeant Markham Andrew Tourell Constable Cummings Ahmed Khalil Latoni Brian Hawksley Brewster Timothy Block Tanner 스텝 Terence Dudley Writing Ron Jones Directing John Nathan-Turner Production Eric Saward Writing Ron Blight Sound Rod Waldron Editing Lisa Westcott Costume & Make-Up Alan Machin Sound Peter Chapman Camera Mike Houghton Editing Dick Mills Crew Fred Wright Lighting Tony Burrough Art Roger Limb Sound Rosalind Ebbutt Costume & Make-Up Dave Chapman Visual Effects Tony Auger Visual Effects