Who’s joining the #TrickstersBrigade? The episode rewatch kicks off at 7pm GMT. We’ll be joined by legendary Doctor Who director @GraemeHarper5

The Doctor, Romana, K9 and Adric - an Outler from Alzarius who has stowed away aboard the TARDIS - arrive on a planet where the native villagers live in fear of 'the Wasting' and of three Lords named Zargo, Camilla and Aukon who rule from an imposing Tower. The Lords are soon revealed to be vampire servants of the last of the Great Vampires, a race referred to in Time Lord mythology.

The Doctor, Sarah and Harry come across a crew of shipwrecked astronauts after being lured by their fake distress call. The Doctor soon discovers the astronauts are being experimented on by the Sontarans in preparation of a full-scale invasion of Earth.

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.

Turlough searches for his home planet with the help of the Doctor and a new companion named Peri.

Turlough searches for his home planet with the help of the Doctor and a new companion named Peri.

The Doctor encounters the first human colony on Mars, Bowie Base One.

The Doctor suspects something isn't quite right with the daughters of the family that protects the streets of Venice.