Episode Three
Series Episode Number: 301World Premiere: Sat 5 Jun 1971 - 6:11pm BST [BBC One] (United Kingdom)
First Broadcast: Mon 22 Dec 1975 - 6:30pm CST [WTTW 11 Chicago]
Running Time: 24 minutes 27 seconds
8.10 Million (UK)
Chart Position: 34 () (UK)
Recorded on Wed 19 May 1971 in Television Centre 4
Archive State: PAL Restor
The Doctor attempts to help the Brigadier penetrate the heat barrier, but is attacked by the Master's servant in a helicopter. The Master prepares to summon the Daemon Azal.
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