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.

On a divided Snowpiercer, Melanie intensifies her search for Layton while Layton is weaponizing her secret. Third Class faces a reckoning when he presents them with a choice.

Hiding out with help from his allies, Layton lays track for revolution and an engineering emergency threatens every soul on Snowpiercer.

A real friend is one who walks in when the rest of the world walks out.

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.

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.

Hannah thinks someone is stalking her and sets a trap. Hannah’s mother confronts the principal, and Clay strikes back at someone who wronged Hannah.

Jealousy and gossip take a toll on Hannah’s relationships. As Alex struggles with feelings regret, the guys pressure Clay into getting drunk.