The TARDIS narrowly avoids becoming engulfed in a cobwebby substance in space. It arrives in the London Underground railway system, the tunnels of which are being overrun by the web and by the Great Intelligence's robot Yeti. The time travellers learn this crisis was precipitated when Professor Travers, whom they first met in the Himalayas some thirty years earlier, accidentally caused one of the Yeti to be reactivated, opening the way for the Intelligence to invade again.
Release Date: March 09, 1968
August 09, 1985
October 23, 2020
January 18, 2014
August 03, 2007
July 21, 2008
July 11, 2008
February 16, 1962
May 31, 2004
October 31, 1992
July 03, 1991
July 02, 2003
May 02, 1997
June 08, 1999
July 26, 2002
November 30, 2013
December 23, 2021
July 25, 2001
February 07, 1968
November 28, 2013
July 04, 2017