While Rollo worries about the Seer's prophecy, the Vikings make final preparations for their raid on Paris.
An alliance angers Floki; Princess Kwenthrith makes political moves.
As the new Viking settlement prepare for their first harvest, King Ecbert pays them a visit.
A mysterious wanderer arrives in Kattegat; Lagertha and Athelstan establish a Viking settlement.
King Ecbert proposes a deal to the Vikings in the Season 3 premiere. Later, Ragnar leads his forces into battle.
When safely back at Kattegat with King Horik, Ragnar only trusts those who stood by him.
Ragnar's invading party are met with extreme violence when they march on King Ecbert's villa.
Horik and Ragnar travel to Wessex, but their true purpose is disputed. Meanwhile, Princess Aslaug's prepares to give birth.
Justice is dealt to Jarl Borg, and allies are made on both sides of the sea.
Ragnar receives an unexpected offer from King Horik and Lagertha's new husband doesn't seem overly pleased to see her. Meanwhile, Athelstan becomes King Ecbert's trusted aide.
Lagertha is once again reunited with Ragnar and Bjorn make another choice. Meanwhile, Athelstan finds it difficult to define his faith and Aslaug has to accept the consequences of her prophecies.
While Ragnar meets Ecbert in search of a compromise, Rollo must lead his people. Meanwhile, Jarl Borg imposes a strict rule on Kattegat.
While the raids on Wessex continue, Ragnar attempts to rule in the west. Meanwhile, King Ecbert faces a new kind of enemy and Jarl Borg makes his own plans for Kattegat.
Four years have passed and Ragnar leads a new series of raids on England.
As Princess Aslaug journeys to Kattegat, Ragnar allies himself with King Horik in the battle with Jarl Borg.
While a plague ravages the village of Kattegat, Ragnar sets off towards Götaland, where he must settle land dispute with Jarl Borg.
Athelstan comes to realise just how strong his Christian faith remains, when he accompanies Ragnar and Lagertha on the traditional Viking pilgrimage to Uppsalla.
As Ragnar sails three ships towards King Aelle, he offers peace in exchange for ransom.
When Ragnar discovers that Earl Haraldson ordered Rollo's torture, a confrontation between the two men is inevitable.
When a paranoid Earl Haraldson learns from a seer that Ragnar wants him dead, he orders Ragnor's farm and home burned to the ground.
Earl Haraldson allows Ragnor to return to England, where an explosion of violence and mayhem are unleashed onto the unsuspecting town of Hexam.
A monastery in Lindesfarne is the first victim to Ragnar and his men.
As Ragnor prepares for his first journey into the unknown Western lands, the suspicion and paranoia of Earl Haraldson escalates.
It is 793 AD and Viking warrior Ragnar Lothbrok wants to go to the West in search of riches, rather than following the old tradition of raiding the East. However, getting the permission of Head Man, Earl Haraldson, is not going to be easy.moreless
Rory O'Flanagan guides Artie through a what if scenario if he never joined Glee club, which ends giving him a retrospective on who he really is. Kurt gets a surprise visit from his father and has a Christmas reunion with Blaine in New York. Jake and Puck do some brotherly bonding while celebrating Hanukkah together in Hollywood. Brittany and Sam have an idea on how to deal with Mayan Apocolypse. Sue does a good deed, which leads to her getting serenaded by the kids.moreless