When TARDIS explores an abandoned space station they find the last survivors of Earth.

An insect life form has laid eggs that infect one of the re-animated human beings.

The Doctor and friends attempt to lure the Wirrn hatchlings towards a shuttlecraft.

Although fully changed into a Wirrn, the human in Noah tries desperately to break through.

The Doctor travels to Logopolis, a city of pure logic, and into the Master's latest trap; with Tom Baker.

The TARDIS lands on a warring planet.

Brainwashed soldiers from the past battle.

The Doctor and Sarah encounter Professor Sorenson who plans on transporting anti-matter.

The Doctor and Sarah arrive too late, and a ravenous monster emerges from Zeta Minor.

The Doctor and Sarah continue their efforts to stop the release of deadly anti-matter.

The Doctor realizes not only must he save the universe, but Sorenson, from himself.

While in Victorian-era London investigating oddities such as spontaneous combustions and a dinosaur in the Thames, Clara struggles to know the man the Doctor has become.

When the TARDIS lands in the village of Devesham, the Doctor realizes that the local people are all android duplicates, and that they're not on Earth at all.

The Tardis is captured by the Mandragora Helix. The doctor realizes the Mandragora energy is loose and enters an underground temple and reveals itself to the outlawed Brotherhood of Demnos.