老版神秘博士第五季第一大集，分为小集。 　　The Doctor and his traveling companions, Jamie and Victoria, arrive on a planet where an archaeological expedition led by Professor Parry is searching for the home of the long-extinct Cybermen. Parry believes they have found the Cybermen's home, the city of Telos. The Doctor finds a way to get them inside the complex and the group splits up to explore what t...