Factions in Greenland spill blood, driving Ubbe’s company away. Troops under Ivar and Dir seize Kiev for Prince Igor. Gunnhild makes a fateful choice.

As his enemies scheme for power, Harald prepares for his coronation and chooses a queen. Ubbe’s party reaches shore — but not the one they’re seeking.

The election for Kattegat’s new ruler is held, but a surprise visitor disrupts the proceedings. Ivar puts his plan to overthrow Oleg into action.

Ubbe persuades the settlers in Iceland to embark on a voyage of exploration. The defeat of the Rus creates power vacuums in both Kattegat and Kiev.

Ivar and Igor may be plotting against Oleg, but they’re still part of the force that departs Kiev to invade Scandinavia. King Harald and King Bjorn begin furious preparations for…

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.

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…