“Suddenly and terribly, the Time Lords faced the most dangerous crisis in their long history…”
A mysterious evil is at work on Gallifrey: The President of the Timelords has been assassinated and the Doctor caught red-handed. An inexorable master plan has been set in motion. There can be no escape. Now The Doctor must face the final challenge… and the ultimate enemy with old scores to settle…
Originally transmitted 30th October 1976 – 20th November 1976, this adventure is available for the first time on BBC Video.
