In "The Web of Fear", aired in 1968 and set forty years after "The Abominable Snowmen", the Yeti artifacts that Travers brought to England reawaken due to the return of the Great Intelligence. The Yeti then subjugate London and engulf the Underground in web. The only resistance offered is by a band of soldiers, led first by Captain Knight (Ralph Watson) and then by Colonel Lethbridge-Stewart (Nicholas Courtney), with scientific support provided by Travers, his daughter Anne Travers (Tina Packer) and later the Doctor. The invasion of the London Underground is revealed as a trap designed to draw in the Doctor so that the Great Intelligence can drain the Doctor’s mind, but it is again defeated and banished.