Amazon.com description: Product Description: [Narrated by Willaim Hartnell, Peter Purves and a Full Cast] William Hartnell is the original Doctor in the most epic Doctor Who story ever made, in which his arch-enemies, the Daleks, threaten to destroy the fabric of time itself! In their quest to gain control of the Solar System, the Daleks have taken possession of the Time Destructor, a weapon which threatens the safety of all who stand in their way. As they head up an alliance of alien races bent on destroying the human race, in their midst is none other than the treacherous Guardian of the Solar System, Mavic Chen. A dangerous chase ensues across volcanoes, jungles, deserts and futuristic cities, as the Doctor and his companions struggle to prevent the Daleks plans coming to fruition. The stakes are high, and for the first time in the programs history, the lives of two TARDIS travelers are lost. Peter Purves (who played Steven in the story) narrates these thirteen episodes, only two of which survive in the television archives. INCLUDED is the special teaser 'Mission to the Unknown', which was transmitted some weeks before the master plan itself was unleashed.