Katy Manning

Sir Reginald Styles, a diplomat with the best chance of averting a war between Russia and China, is almost killed by a mysterious guerrilla.The fighter then disappears with Jo and the Doctor - into a terrifying future Earth ruled by Daleks.

Old friends fight together - but is it too late to stop the sinister Shansheeth?

The Master forms an uneasy alliance with the Doctor so that between them they can subdue the Keller Machine which is now out of control.

The Master arrives, posing as an adjudicator from Earth who has come to settle the dispute between the colonists and the miners. However, the Master has an agenda of his own.

The Master is behind the Keller Machine and uses it to recruit the rioting inmates at Stangmoor Prison. He plans to capture a missile and fire it at the World Peace Conference.

The Interplanetary Mining Corporation, represented by Captain Dent, arrives on the planet claiming that the colonists have no right to be there.