Being a comedian as well as a historian, Terry Jones takes an established belief, turns that around, and presents proof for his assertion.
In the episode on Kings, he says, "History isn't necessarily what happened. It's often what people want us to think happened.", with the following examples:
* Richard the Lionheart was actually a bad king, who only saw England (which he hated) as a means to finance his warmongery, whereas Richard III did a lot of good for England. Modern perceptions of these kings are reversed because chroniclers of the time were commissioned to write what was politically most convenient.
* Louis, count of Artois (later king of France), was acclaimed as king of England yet appears in no history books as such (see First Baron's War).
You can download it from here, or watch it:
The Peasant
The Monk
The Damsel
The Minstrel
The Knight
The Philosopher
The Outlaw
The King