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

Finding the fourth segment of the Key to Time was simple enough, but holding onto it may be another matter. The Doctor finds himself embroiled in the political games of the planet Tara, where androids complicate the coronation of the planet's rightful Prince.

An anachronistic twelve-million-year-old human skull has been discovered by archaeologists and is now being used by Professor Fendelman in his time scanner experiments at Fetch Priory in contemporary England. The skull is actually an artifact of the Fendahl, an ancient creature that feeds on the life force of others.

The Doctor learns the Cybermen's nefarious plan.

The space freighter is on a collision course with Earth.

On the set of "EastEnders", a celebration of the history of film, music, theatre and television; the team appraise rare and unusual items of entertainment memorabilia, including a script for the first episode of "Doctor Who."