The battle begins between Ragnar and King Horik’s forces against Jarl Borg; Princess Aslaug makes her way to Kattegat.
Ragnar and Ecbert come face to face; Jarl Borg rules Kattegat with an iron fist; Rollo must now become the leader his people need in Ragnar’s absence.
As Victor struggles to resurrect Brona, Ethan prepares to leave London and Malcolm discovers that Vanessa is plagued by new visions.
Arya makes progress in her training. Sansa confronts an old friend. Cersei struggles. Jon travels.
Lagertha and Ragnar unite to try to win Kattegat back from Jarl Borg; Aslaug must face the truth of her prophecies; Athelstan struggles to define his faith; Bjorn must once…