Complete story — includes the ending
Ragnar announces his plan to raid Paris, and gives Ubbe and Hvitserk their arm-rings, so they can travel with him. Before they leave, Ragnar asks the Seer how he will die; he replies that Ragnar will die when "the blind man sees him". In Wessex, Ecbert sends Aethelwulf and Alfred on a pilgrimage to Rome. In Paris, Charles begs Rollo to not return to Ragnar, and Rollo assures him that he will not. Odo reveals to Therese that he will have Charles killed and overthrown. Meanwhile in Kattegat, after the warriors set sail, Harbard returns. A storm throws the Vikings' ships off course. Ragnar, Lagertha, and Harald arrive in France, where they set up camp. Harald and Halfdan take their French prisoners and burn them alive, cheered on by Erlendur. Once the remaining ships arrive, the Vikings sail up the river towards Paris. Ragnar takes more "medicine" and hallucinates. As the ships approach Paris, they see Rollo waiting with his new French allies.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Vikings season 4. HTML formatting and reference markers removed. · Content license