Katy Manning

On Draconia, the Doctor reveals the Master’s plan to provoke war to the Draconian Emperor. But the Master escapes, taking Jo as hostage.

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.

The Keller Machine breaks free of the Doctor’s restraining device and the Doctor has no choice but to turn the parasite against the Master.

The Doctor leads a mission to the Ogron home world to apprehend the Master and rescue Jo. But the Master is in league with some old enemies of the Doctor.

The mind parasite within the Keller Machine becomes too powerful for the Master to control. It learns how to move of its own accord and goes on the hunt for new minds.

The Doctor and Jo are the Master’s prisoners. In a bid to escape, the Doctor makes a dangerous spacewalk.