Overview: As UNIT are transporting a nuclear warhead around Carbury, knights in armour arrive to continue waging a war that began thousands of years ago, but in a wholly different dimension.
Overview: The Doctor and Ace discover a stone spaceship underneath Warmsley's archaeological dig while Mordred summons Morgaine to Earth's dimension.
Overview: The Brigadier rescues the Doctor from the stone spaceship before they set out to locate Morgaine before she gains Excalibur.
Overview: Morgaine forces Ace and Shou Yuing to hand over Excalibur by threatening to release the Destroyer, so the Doctor and the Brigadier enter a dimensional portal to stop her.
Overview: The Doctor and Ace explore Victorian house Gabriel Chase and realise it hides just as many dark secrets in its drawing room as it does in its dark cellar.
Overview: The Doctor manages to rescue Ace from the husks and then tries to uncover the truth about the goings on in Josiah's house.
Overview: Only Redvers, still searching for the elusive Saxe-Coburg, seems able to withstand Light and communicate with Control. Ace realises her past actions need to be dealt with.
Overview: England, the 1940s. The TARDIS brings the Doctor and Ace to a secret naval base during WWII. There, the time-travellers battle vampiric Haemovores and an ancient Viking curse!
Overview: The Doctor and Ace manage to convince Sorin to release them while Millington and Judson attempt to translate the Viking runes.
Overview: The Doctor and his friends come under attack from the Haemavores, allowing Millington to retrieve the flask containing Fenric's essence.
Overview: Fenric is loose and planning to use the Ancient Haemovore to poison the Earth with chemicals, unless the Doctor can defeat him in their centuries old game.
Overview: Perivale, England, the late 1980s. People are vanishing into thin air under the baleful stare of a very strange cat. The Doctor and Ace learn that, in the battle for survival, success can carry a terrible price...
Overview: The Doctor and Paterson manage to escape from the Master and join up with Ace and her friends, where the Doctor tries to find a way to get them all off the planet before it explodes.
Overview: Ace manages to transport the Doctor and the others back to Perivale but the Master is also there, preparing for a final showdown with the Doctor.