Complete story — includes the ending
A fleet of Frankish ships led by Rollo approaches the Vikings, and Gisla prays for him. The Vikings and Franks battle, and the Vikings defeat the first French wave. Rollo leads his remaining ships into battle. Meanwhile in Paris, Charles has Roland and Therese executed. Gisla continues praying. Back in the battle, Ragnar and Rollo begin to fight. Halfdan, Floki, and Lagertha are wounded. The Franks gain the upper hand, and Ragnar tells Bjorn to take Lagertha and retreat. Ragnar charges Rollo but is grabbed and thrown back into a ship, as they retreat. Rollo is greeted by Charles and Gisla, and acclaimed by Paris. Ten years later, Ragnar has disappeared from Kattegat. Aslaug is now the sole ruler with Bjorn by her side. Thorhall delivers the news to Aslaug and Bjorn that Ragnar supposedly has a son named Magnus in Wessex. He also tells them the Norse settlement in England had been slaughtered. Bjorn and his brothers discuss their father. He plans to sail into the Mediterranean, and Floki and Helga agree to come on the journey. Ragnar unexpectedly returns to Kattegat. At first he challenges his sons to kill him if they want to become the King. When they do not take the challenge, he offers it to the villagers.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Vikings season 4. HTML formatting and reference markers removed. · Content license