Doctor Who
War Machines

The TARDIS arrives in London in 1966 and the Doctor and Dodo visit the Post Office Tower. There they meet Professor Brett, whose revolutionary new computer WOTAN (Will Operating Thought ANalogue) can actually think for itself and is shortly to be linked up to other major computers around the world - a project overseen by civil servant Sir Charles Summer.

It transpires however that WOTAN considers that humans are inferior to machines and should therefore be ruled by them. Exerting a hypnotic influence, it arranges the construction of War Machines - heavily-armed, self-contained mobile computers - with which to take over the world.