Horrible Histories returns for a special about King John and Magna Carta, starring Ben Miller. John annoys the Barons and agrees Magna Carta at Runnymede, after a banging rap battle. Meanwhile across the world we meet the formidable Genghis Khan in Mongol
Finn attempts to prove to Jake that Flame Princess isn't evil while trying to win her heart turns into a quest to stop her from taking over the Goblin Kingdom.
