Since his incarceration at the end of The Daemons, the Master has been the model well-behaved prisoner. The Doctor and Jo pay a visit to the island fortress where he is imprisoned, and meet a seemingly changed man. The Doctor becomes suspicious that it’s all a ruse and that his nemesis in planning an escape.
Meanwhile, numerous ships near a Royal Navy base have been sunk, attacked by an aquatic cousin of the Silurians. The Doctor must race against time to stop them before the Navy launches a nuclear strike. Find out what happens in this episode of Lonely Gods.