Doctor Who: The Armageddon Factor -Vhs- Tom Baker. 1995 Doctor Who- The Armageddon factor Vhs. Staring Tom Baker as the 4th doctor. The doctor, Romana and K9 conclude their search for the six disguised segments that make up the powerful key of time. Arriving on the planet Atrios, the doctor and his companions become embroiled in the Atrians seemingly endless war with their neighbouring planet Zeos. Their ruler, the Princess Astra has been kidnapped, leaving the deranged marshal in sole charge of the war effort. Approximately 148 minutes run time. Used in lovely condition. Dispatched with Royal Mail 2nd Class.