The Earl accepts Ragnar's challenge, and the two meet in single combat. Ragnar kills Haraldson, Rollo kills Svein, and Siggy kills her hapless son-in-law. After Ragnar becomes the new Earl, he grants his dead foe a chieftain's burial at sea, and Athelstan is revolted to see a slave agree to follow her master in death. During the following winter, Lagertha becomes pregnant and Siggy accepts Rollo's protection and his proposal to marry an Earl – himself. Athelstan asks Ragnar about Ragnarök. Unknowingly Athelstan has broken a social taboo, but Ragnar informs him by feeding him a drug and having the village seer tell Athelstan. This causes the monk to have horrific visions of the world's end. As spring beckons, three of Ragnar's ships sail up the River Tyne. After throwing the luckless Wigea into a snake pit, King Aelle prepares to meet the raiders in battle.