Ivar is crowned the new king of Kattegat just in time to welcome Rollo home.

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

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

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…

Quatre années de paix se sont écoulées sous le règne de Ragnar, désormais marié à la princesse Aslaug. Désireux de conquérir de nouveaux espaces, le viking annonce à son peuple…

The battle begins between Ragnar and King Horik’s forces against Jarl Borg; Princess Aslaug makes her way to Kattegat.

L’amertume de Siggy la pousse à nouer de dangereuses alliances. Le roi Horik profite de cette rancoeur pour garder la main sur Ragnar.

Ragnar rencontre le roi Ecbert. Le face-à-face entre les deux hommes doit permettre d’ouvrir la voie à de futurs compromis. Profitant de la situation,

A seer reads Earl Haraldson’s future and tells him that Ragnar searches for his death.