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Vikings, season 4 episode 6 «What Might Have Been»: air date March 24, 2016. Episode overview, season trailer and the cast of Vikings.
Ragnar announces a raid on Paris at the Thing in Kattegat. The fleet is battered by a storm after it sets sail, but the greatest challenge for the Vikings lies ahead in Paris, where Rollo awaits. Meanwhile, Ecbert dispatches Aethelwulf and Alfred on a pilgrimage to Rome.