Doctor Who leads the rebels in an attack on the Tower.

After a meeting in space with a group of unseen aliens the Doctor returns to Gallifrey and claims the presidency of the Time Lords. Leela meanwhile tries to work out why he is behaving out of character. At his induction, the Doctor is 'crowned' with a device giving him access to the Matrix. He then arranges for the transduction barriers around Gallifrey to be put out of action by K9. When this is done, his alien 'friends' materialise. They are telepathic invaders called Vardans.

The TARDIS is hijacked in the vortex by a time sensitive Tharil named Biroc, and brought to a strange white void. Biroc wants to free the others of his race who are being transported in a slave ship, captained by Rorvik, which is also trapped in the void. The only other thing present in the void is an ancient gateway leading to a decrepit banqueting hall.

The Doctor hopes mathematicians on planet Logopolis can reconfigure the outer shell of the TARDIS.

The Doctor arrives in present day England to meet a professor experimenting on the fossilized skull of a long dead god-like being. When it awakens and kills, the Doctor jumps into action to prevent others from exploiting the skull's dreadful power.

After a meeting in space with a group of unseen aliens the Doctor returns to Gallifrey and claims the presidency of the Time Lords. Leela meanwhile tries to work out why he is behaving out of character. At his induction, the Doctor is 'crowned' with a device giving him access to the Matrix. He then arranges for the transduction barriers around Gallifrey to be put out of action by K9. When this is done, his alien 'friends' materialise. They are telepathic invaders called Vardans.

The Doctor and Adric prepare to travel to Logopolis, the City of Logic.

The Doctor sets out to foil Azal's plan to destroy Earth.

Jo saves the Doctor from the evil Azal.

The TARDIS crash-lands on "Frontios," a remote planet whose colonists are burdened by meteorite showers and the disappearance of their leader. Peter Davison, Janet Fielding. Brazen: Peter Gilmore.

Turning back the clock has consequences.

As a spaceship hurtles towards the sun, the Doctor and Martha have just 42 minutes to save the day.

Part 1. The Doctor finds an unusual hiding place.

Part 2. Smith and Jones are under siege.

When people start to disappear, a young woman finds cryptic messages bleeding through from a mysterious stranger called the Doctor.

Capt. Jack storms back into the Doctor's life; the Tardis travels to the end of the universe.

The overlap between quantum reality and science fiction is discussed.