Part One
Series Episode Number: 689World Premiere: Wed 25 Oct 1989 - 7:34pm BST [BBC One] (United Kingdom)
First Broadcast: Sun 1 Sep 1996 - 11:00pm CDT [WTTW 11 Chicago]
Running Time: 24 minutes 23 seconds
4.30 Million (UK)
Appreciation Index: 67 (UK)Chart Position: 104 () (UK)
As Russian forces approach the English coastline, an ancient evil stirs beneath the surface of the water. For Ace and the Doctor, a deadly game of revenge has begun
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