Genesis of the Daleks The Doctor travels to the war-torn planet Skaro, where the immoral Davros prepares to unleash the destructive power of the Daleks. The Doctor must avert the creation of his deadliest enemy - but does he have the right? Revenge of the Cybermen Returning to Nerva Beacon, the Doctor, Sarah and Harry find the station ravaged by plague - but caused by what? The Doctor's suspicions are aroused by Voga, a planet with a link to one of his deadliest foes. The Cybermen are coming... Terror of the Zygons The Doctor, Sarah and Harry return to Earth to help the Brigadier and UNIT investigate the destruction of oil rigs in Scotland. An alien terror lurks beneath the dark waters of Loch Ness - the Zygons want the planet as their own.