The King's Demon

STORYLINE

It is 13th Century England and King John is visiting the castle stronghold of Sir Ranulph Fitzwilliam. Ranulf's personal fortune has dwindled away, freely donated to King John to help fund the Crusade.

When the TARDIS materializes and disturbs a jousting duel, the Doctor's party are proclaimed friendly demons by the King, who seems strangely interested in their 'blue engine'. Before long the Doctor becomes embroiled in court politics, and he realizes that there is far more to the situation than a simple battle of honor between nobles.

Ranulf's cousin, Sir Geoffrey de Lacey, arrives at the castle and is astonished to find the King present. He has just left His Majesty in London preparing to sign Magna Carta, a document that will shape the future of democracy in the western world. The Doctor learns that neither the King nor Sir Gilles Estram are exactly who they claim, and that their true identities involve a battle-ravaged alien planet light-years away, and one of the Doctor's oldest and deadliest enemies...