Episode One
Series Episode Number: 299World Premiere: Sat 22 May 1971 - 6:16pm BST [BBC One] (United Kingdom)
Running Time: 25 minutes 5 seconds
9.20 Million (UK)
Chart Position: 26 () (UK)
Recorded on Tue 11 May 1971 in Television Centre 4
Archive State: PAL Restor
The Doctor tries to prevent Professor Horner from breaking into an ancient barrow near the village of Devil's End. Posing as the village vicar, the Master summons dark forces.