Full episode spoilers.
Kjetill fences off the beached whale and refuses to share its meat with Greenland's starving settlers. Their argument becomes a fight, and Ubbe is drawn into the violence. Othere helps him escape while Torvi fights with baby Ragnar in her arms. They flee aboard a ship, leaving their supplies behind. Kjetill stands on the whale declaring himself king of Greenland. Out at sea, rain finally gives the desperate travellers drinking water.
Dir's forces march on Kiev with Igor, and Oleg's soldiers transfer their allegiance to the young prince. Oleg appears before them and appeals for peace and forgiveness. Ivar urges Igor to act, and the boy shoots his uncle with an arrow, killing him. Katia tells Ivar that she is pregnant with his child. He nevertheless decides to leave Rus with Hvitserk. Igor struggles with their farewell as the brothers depart, with Hvitserk noticing how much Ivar has changed.
In Kattegat, Ingrid confronts Erik about their past, revealing that he was the slave trader who sold her. She proceeds with her marriage to Harald, who still expects Gunnhild to join him as another wife. Gunnhild arrives at the water during the wedding ceremony and says she intends to join Bjorn in Valhalla. Erik moves to intervene, but Harald stops him. Gunnhild swims out and drowns, leaving Harald grieving while Ingrid remains beside him as his new queen.