The Doctor meet Professor Parry and his archaeologists on the planet Telos. The expedition is there to unearth the remains of Cybermen who died out long ago. Or did they?
The Doctor and archaeologists discover the city of Telos isn't as dead as they assumed.
The tombs are revealed to be a trap. The Cybermen have risen from their centuries long hibernation and are intent on converting the humans into a new race of Cybermen.
The Cyber Controller has been revitalised after leaving the icy tomb, threatening to overpower his human foes. The Doctor is determined to return the Cybermen to their long sleep.
