On the planet Telos, The Doctor, his companions meet an expedition team hoping to discover the lost tombs of, the Cybermen. Deep beneath the surface, a labyrinth of bobbytraps and deadly creature stir, as the Cybermen silently await the command to rise and conquer other worlds once more. Cast Patrick Troughton (Dr Who), Frazer Hines (Jamie), Deborah Watling (Victoria), George Pastell (Eric Klieg) Aubrey Richards (Professor Parry), Cyril Shaps (John Viner), Roy Stewart (Toberm