Part One
Series Episode Number: 580World Premiere: Mon 3 Jan 1983 - 6:45pm GMT [BBC One] (United Kingdom)
First Broadcast: Sun 25 Nov 1984 - 11:00pm CST [WTTW 11 Chicago]
Running Time: 24 minutes 37 seconds
7.20 Million (UK)
Appreciation Index: 69 (UK)Chart Position: 74 () (UK)
During a clandestine meeting on Gallifrey, the Doctor has been chosen to be a part of a terrible act. Unaware, the Doctor and Nyssa trace something odd to Amsterdam
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