Post Description

regular cast:
Tom Baker - (The Doctor)
Lalla Ward - (Romana II) 
David Brierley - (Voice of K9)

When one of the Artefacts of Gallifrey - a dangerous book dating back to the time of the all-powerful Rasillon - goes missing from his study, Cambridge professor and retired Time Lord Dr. Chronotis calls in the aid of the Doctor and Romana. The Doctor is very worried. Who knows what powers could be unleashed if the book falls into the wrong hands?
Then the mysterious Skagra arrives, armed with a thought-draining sphere and a scheme for one universal mind. But first he must get hold of the book
 
This story was never completed due to a strike at the BBC in November 1979
As the story was never completed, Tom Baker provides linking material for the video release