The planet of Tara holds the fourth segment of the Key as a statue, and the Doctor becomes involved in the feud that exists between Count Grendel and Prince Reynart.

Jemma is away on a business trip, and Leslie's off to a Doctor Who convention.

The TARDIS is intercepted by the megalomaniacal xerophyte Meglos and trapped in a time loop.

The TARDIS falls through a CVE into E-Space and arrives on the planet Alzarius. There the inhabitants of a crashed Starliner and a group of young rebels called the Outlers, led by a boy named Varsh and including his brother Adric, are being terrorised by a race of Marshmen who emerge from the marshes at a time known as Mistfall.

The Doctor races to thwart a curse.

Cheetah People stalk young, healthy humans.

The Doctor and Amy travel to Britain of the future, where people live in a giant spaceship; Amy comes across the terrifying Smilers.

The Doctor and Amy meet Winston Churchill during a trip back to World War II, where they also encounter the Daleks.

Jemma is away on a business trip, and Leslie's off to a Doctor Who convention.

An unidentified force traps the Doctor; The Doctor investigates a mysterious staircase in a building where people can go up, but never down.