Bjorn, Lagertha and Ubbe face an uncertain fate as Heahmund’s loyalty is tested. Floki fights to understand the will of the gods. Ivar may have met his match.

Ivar is crowned the new king of Kattegat just in time to welcome Rollo home. Bjorn, Lagertha and Ubbe must rely on unsteady alliances to survive.

A sense of doom looms over Kattegat as bloodshed ensues. The defeated army flees in the face of the victors. A legendary warrior makes his way home.

The army leaders consider their options in the aftermath of the battle. In Floki’s camp, all hopes of binding the community together are dashed as tragedy unfolds.

The battle for Kattegat begins and, as the two armies line up to fight, the Great Heathen Army must decide between a final plea for peace or all-out war. Floki…

Bjorn returns to Kattegat to learn that an attack will take place during the next full moon. Ivar must decide if he can place his trust in a former enemy…

Lagertha is betrayed, and Bjorn must find a way to support the distraught queen. Floki and his settlers arrive in a new land, but it is far from what they…

Ivar meets his match in Heahmund. Floki returns to Kattegat. Bjorn receives a lavish welcome in North Africa.

Guided by Heahmund’s visions, the Saxons devise a battle plan. Ivar the Boneless strategises as the Vikings undergo increasing pressure. Bjorn Ironside finds himself in a new territory and must…

Celebrations are cut short in the aftermath of the battle at York. Ragnar Lothbrok’s sons are pitted against each other as tensions reach an all-time high, and each is forced…

Tensions mount between the sons of Ragnar Lothbrok as the Vikings continue to threaten the very heart of England. As the Great Army moves to take York, with King Aethelwulf…

Tensions mount between the sons of Ragnar Lothbrok as the Vikings continue to threaten the very heart of England. As the Great Army moves to take York, with King Aethelwulf…

Prince Aethelwulf finds himself subject to the Vikings’ battle master plan. Ecbert remains behind with a plan of his own.

The Viking army causes panic in the English countryside as King Ecbert and Aethelwulf plan the defense of the realm.

Ragnar’s plan comes to fruition. The Viking army lands on the coast of Northumbria.

The Viking army begins to gather in Kattegat. Lagertha remain vigilant in the absence of her son, Bjorn.

Bjorn’s fleet sails onward and launches a surprise attack. Back in Kattegat, Lagertha continues in her quest for power.

Ragnar and Ivar plot against the Saxons and reach a new level of understanding.

Lagertha attempts to fulfill a long-held ambition. Ragnar negotiates an unexpected concession from King Ecbert.

Ragnar’s fleet is shipwrecked and washes up on the Wessex coast, but without enough survivors to form a credible force, Ragnar and Ivar have a difficult decision to make. Rollo…

The Kattegat locals chide Ragnar that the gods have deserted him as he struggles to crew his voyage to Wessex. It’s Bjorn who has charisma now as he prepares to…

Ragnar returns to Kattegat and formulates a plan to head back to Wessex, where he intends to right past wrongs.. Meanwhile, Lagertha plans a power play in Kattegat and Bjorn…

A ferocious battle between the Vikings and the French eventually comes down to Ragnar against Rollo. The outcome will seal the fate of the two brothers.

The labors of the Vikings eventually bear fruit as, within sight of Paris, they re-launch their boats but this time along with some interesting structures that Floki has built. Aethelwulf…

Defeat for the Vikings calls Ragnar’s leadership into question as they evacuate their camp and move back down river. Ragnar remains inscrutable until he orders the fleet to beach at…

In England, King Ecbert’s true ambitions are revealed as he plots to gain the crown of Mercia while outside Paris. The Vikings attack Paris with considerable force, but will Rollo’s…

Ragnar declares another raid on Paris at the Thing in Kattegat. Ecbert also has a journey in mind as he dispatches Aethelwulf and Alfred on a pilgrimage to Rome.

There’s an air of betrayal as those whom Odo trusts plot against him. Ecbert agrees to support Kwenthrith in Mercia. Pregnancy brings happiness to Lagertha and Kalf and a marriage…

King Aelle goes to Wessex for Christmas and is not impressed with how family relations are developing. Rollo’s future hangs in the balance.

Floki learns of the heavy price he has paid for his actions. Rollo finds an unlikely ally in Count Odo. Bjorn has to fight a fierce opponent in the wilderness.

As Ragnar and Floki remain at odds, Rollo makes great efforts in Paris to win over his new bride, Princess Gisla. Meanwhile, King Ecbert sets the task for his son…

A dangerously ill Ragnar returns to Kattegat, where his suspected death kicks off a scramble to succeed him. Meanwhile, Lagertha engages in a power struggle with her calculating, former second…

With one last chance to take Paris, Ragnar, and his Vikings troops take a daring chance. Ragnar asks Bjorn for a favor that could change the course of Viking history.

Paris is hit with a second assault. Emperor Charles needs to make a difficult decision.

The Viking army sets out and Paris goes into lockdown as the army prepares the defense.

The Viking fleet causes panic in Paris. The Emperor Charles declares he will remain in the city.

Preparations for the Paris raid pick up speed, and Rollo thinks about the Seer’s prophecy.

The fleet returns to Kattegat to discover tragic circumstances await.

There is bitterness in the camp, Floki is angry over the alliance with Ecbert.

King Ecbert visits the developing Viking settlement as the first harvest is sown.