Doctor Who: The Stones of Blood: Special Edition

The search for the third segment of the Key to Time leads the Doctor and Romana to the English countryside and an ancient stone circle called the Nine Travelers. There they meet Professor Amelia Rumford and her friend Vivien Fay, who are conducting a new survey of the stones. Curiously, the number of stones has not been consistent in the historical sources the professor has researched. The circle is also sacred ground to a cult of druids. Dismissed as harmless crackpots by Vivien, they are in fact deadly serious in their worship of the Cailleach, the Celtic goddess of war, death and magic. Some practitioners are willing to resort to human sacrifice to serve the goddess's ever increasing demand for fresh blood. Though the tracer has led the Doctor and Romana to the Nine Travelers, none of the stones actually registers as the segment. Before that mystery is solved, the Doctor will need to explain why he drove Romana over a cliff and how enormous boulders are able to move about the countryside at will.

The Doctor, Romana and K9 are led by the tracer to the Nine Travellers, a circle of standing stones on Boscombe Moor in present-day England, but the third segment is nowhere to be found. They meet elderly archaeologist Professor Emilia Rumford and her assistant Vivien Fay, who are surveying the site, and learn that the circle appears to have had a variable number of stones over the years.
The Doctor encounters a group of Druids led by a man named de Vries and narrowly avoids becoming their latest sacrifice. De Vries is later killed by one of the stones from the circle - an Ogri, a life form that lives on blood. Miss Fay is the latest guise of the Cailleach, a being worshipped by the Druids, who has been on Earth for four thousand years. She transports Romana to a spaceship suspended in hyperspace at the same coordinates as the stone circle.
The Doctor follows and accidentally releases two justice machines called Megara, which sentence him to death for breaking the seal on their compartment. When they attempt to carry out their sentence, however, he tricks them into knocking Miss Fay unconscious. Reading her mind, they learn that she is really Cessair of Diplos - the alien criminal they were originally sent to try. Having established her guilt, they transform her into an additional stone in the circle, but not before the Doctor has grabbed her necklace - the Seal of Diplos, alias the third segment of the Key to Time.

Written by David Fisher
Directed by Darrol Blake
Costumes by Rupert Jarvis
Produced by Graham Williams
Script Editing by Anthony Read
Studio Sound - Richard Chubb
Title Music by Ron Grainer and the BBC Radiophonic Workshop, arranged by Delia Derbyshire
Visual Effects by Mat Irvine