Part Four
Series Episode Number: 553World Premiere: Sat 21 Mar 1981 - 5:09pm GMT [BBC One] (United Kingdom)
First Broadcast: Tue 7 Apr 2015 - 8:30pm EDT [Retro TV]
Running Time: 25 minutes 10 seconds
6.10 Million (UK)
Appreciation Index: 65 (UK)Chart Position: 97 () (UK)
Recorded on Fri 23 Jan 1981 in Television Centre 6
With the fate of the universe hanging in the balance, the Doctor and the Master are forced to return to Earth and carry out their plan. But for the Fourth Doctor, it's the end�
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