Havers and Lynley investigate the case of a murdered doorkeeper from the House of Lords. A second murder suggests a wider conspiracy.

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 legendary Paradise Towers is supposed to be the height of luxury but when the Doctor and Mel arrive, they find it is as far from a paradise as possible.

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.

An interplanetary Police Officer hypnotizes key witnesses, including Officer Jane Castle (Simone Bendix), to testify against Lieutenant Patrick Brogan (Ted Shackelford) and Officer Jack Haldane (Rob Youngblood) in the shooting death of a civilian.