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Mike Loades makes a hands-on investigation into the incredible history of duelling with swords - from Viking judicial duels right through to the structured social duels of the 18th century, when a man could fight to the death to defend his honour.
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Miriam Cooke investigates the technology of prehistoric Britain.
Dan Snow presents this film on the Viking history at Lindisfarne.
Tristan Hughes investigates the disastrous encounter in 9 AD between Rome and Germanic Tribes.