크레딧 출연 Jon Pertwee The Doctor Katy Manning Jo Grant Nicholas Courtney Brigadier Lethbridge-Stewart John Levene Sergeant Benton Richard Franklin Captain Mike Yates Stewart Bevan Cliff Jones Jerome Willis Stevens Tony Adams Elgin Ben Howard Hinks Mostyn Evans Dai Evans Talfryn Thomas Dave Roy Evans Bert Mitzi McKenzie Nancy Ray Handy Milkman John Scott Martin Hughes John Rolfe Fell John Dearth BOSS (voice) Richard Beale Minister of Ecology Jean Burgess Cleaner Brian Justice Yates' Guard Terry Walsh Guard Roy Skelton James 스텝 Robert Sloman Writing Michael E. Briant Directing Michael McDermott Production Terrance Dicks Writing Barbara Kidd Costume & Make-Up Dudley Simpson Sound John Harris Production Barry Letts Production Terry Walsh Crew Dick Mills Crew Alastair Mackay Editing Ken Lowe Camera John Burrowes Art Simon Wilson Sound Mike Jefferies Lighting Ann Rayment Costume & Make-Up Richard Chubb Sound Bill Matthews Camera Ron Oates Visual Effects Delia Derbyshire Sound