Synopsis: Landing on a sinister jungle planet, the Doctor tests out his new "ray gun" weapon. The Doctor and his grandchildren soon find themselves being pursued by a giant metal spider. Within the spider is an evil genius who is able to control a group of real giant spiders wit ultrasonic sound. In a bid to return to the TARDIS, the Doctor attempts to turn the tables on the villain by using his recorder to control the spiders' action.
Synopsis: The Doctor joins a group of top scientists at one of several conferences that are simultaneously taking place around the world. The project has been masterminded by the Abbot of Mai'Sung who incapacitates all of the attendees with nerve gas. The Doctor makes a swift recovery and accompanies his still comatose colleagues when they are delivered in to the hands of the Abbot who has the only cure to the effects of the gas. The Abbot intends to combine his own knowledge of the ancient mysteries with the scientific wisdom of the Doctor and his colleagues to run the world.