- Writers: Michael Hirst
- Stars: Alexander Ludwig , Alyssa Sutherland , Cathal O'Hallin , Clive Standen , Cormac Melia , Donal Logue , Edvin Endre , Gaia Weiss , George Blagden , Gustaf Skarsgård , Jefferson Hall , Jessalyn Gilsig , John Kavanagh , Katheryn Winnick , Linus Roache , Maude Hirst , Moe Dunford , Travis Fimmel
With the Norsemen having arrived in Wessex, King Ecbert begins preparations to face them. Ragnar and his raiders attack Winchester and easily defeat the soldiers there. They quickly get control of the monastery and Athelstan knows exactly where to find the treasure. In the scriptorium, he kills a monk and while Horek brutalizes Bishop Swithern, Ragnar lets a young boy live. Lagertha has remarried but her marriage is troubled as Bjorn does not get along with his stepfather. Meanwhile, Auslag has given birth to another son and a prophecy seems to have come true. Jarl Borg remarries and announces his attention to seize all of Ragnar's lands. When Borg attacks, Rollo takes charge of defending Kattegat.