Back up to: Season 5
6/6 When their HQ is destroyed by the web and everyone is captured by Yetis, all seems lost.
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5/6 The Great Intelligence demands that the Doctor allows his mind to be drained.
4/6 The Doctor is able to acquire a sample of the web but the Yeti strike back at Travers.
3/6 The Doctor meets Colonel Lethbridge-Stewart who takes control of the military operation.
2/6 The deadly web continues to advance in the tunnels of the Underground.
1/6 The TARDIS lands in the London Underground, which is deserted apart from a glowing web...