Therefore, its known narrative elements are not a part of the Doctor Who universe as we, on this Wiki, choose to define it. It may have been the basis for a similar story in another medium, however — and that story may indeed be valid.
A new communications satellite, designed by Sir Walter Llewellyn, is launched to link computers across Europe and America. However, it has been sabotaged by a radical scientist named Tilverton, who believes his inventions are being suppressed by commercial concerns. This precipitates an escalating number of computer-related incidents across the globe — including the release of robotic "sensorspheres" which can induce amnesia in any person not wearing a special pendant. The pendant actually denotes membership in the Circles of Powers, a secret cabal led by Llewellyn and which has made a pawn of Tilverton. The Third Doctor discovers that Llewellyn plans to use the global chaos to ignite a third World War, and stops the evacuation of Government officials which would have triggered this stage of the plan. An orbital missile destroys the satellite, and when the Doctor inverts the sensorspheres' programming, the robots wipe the minds of Llewellyn and his co-conspirators. (REF: Nothing at the End of the Lane 3)