Before the Doctor can settle down to married life, he must face one last confrontation with his deadly enemy of certain death - the Master.

The Doctor discovers his old enemy the Master is intent on preventing Earth's industrial revolution in 19th century England. But the Rani, a second rogue Time Lord, has plans of her own...

When the TARDIS is in need of repairs, the Doctor and Peri are forced to land on Varos, a mining planet whose population is entertained and enslaved by a sadistic system of public torture and execution, and find themselves the latest unwilling subjects in this most extreme form of reality TV.

The Fifth Doctor, Tegan and Turlough arrive on Sea Base 4, a nuclear warhead station under the sea that has some very nasty neighbours.

The Doctor and his companions arrive at a medieval joust and are surprised to be greeted warmly by King John, who calls them his demons. But when a young nobleman returns, having just left King John in London, the Doctor realises that this king must be an impostor! Then the Master makes an appearance and the Doctor's worst fears are confirmed...