Starring: Tom Baker

Directed by: Paddy Russell

The future of the cosmos is at stake when the Doctor faces his most fearsome adversary in this four part adventure. Returning to UNIT HQ on Earth, the TARDIS is thrown violently about by a mysterious force and Sarah and the Doctor arrive instead at an old priory in the year 1911. The owner, Marcus Scarman, has been excavating ancient tombs and is possessed by the spirit of Sutekh, bringer of "the gift of death to all mankind". Sutekh has lain for thousands of years in his pyramid prison and Scarman and his robot mummies plan to release this ancient and evil power. Will Sutekh the all-powerful be freed from his bonds and destroy the world, or will the Doctor manage to bring about his destruction?

Originally transmitted 25/10/75 - 15/11/75

Extras include: Commentary by Elisabeth Sladen, Michael Sheard and producer Philip Hinchcliffe. 'Osirian Gothic' - interviews with director Paddy Russell, Elisabeth Sladen, Michael Sheard, Philip Hinchcliffe, Bernard Archard, Peter Copley, Gabriel Woolf and designer Christine Ruscoe. 'Serial Thrillers' - documentary about Philip Hinchcliffe's tenure as producer. Now and Then: The Locations of Pyramids of Mars. Deleted scenes. 'Oh, Mummy' comedy sketch. Photo gallery. Production notes. Easter egg.

The future of the cosmos is at stake when the Doctor faces his most fearsome adversary in this four part adventure

Dr Who, Sci-Fi, Science Fiction, Tom Baker