The Seer Gives Lagertha a Prophecy The Vikings Sail for Wessex Kwenthrith's Story Vikings Battle Brihtwulf's Army Torstein Loses an Arm A Cloaked Figure Arrives in Kattegat Battle for the Hill of the Ash Judith Sacrifice for the Crops Siggy Sacrifices Herself to Save Ragnar's Sons Rollo Learns of Siggy's Sacrifice Bjorn Fights to Save Rollo Helga Tells Floki of Harbard The Seer Laughs at Rollo's Misery Aethelwulf Attacks Ragnar Kills the Messenger Athelstan is Reborn Floki Appears to Kill Athelstan Ragnar Honors Athelstan's Death Ecbert Sends Athelwulf on a Journey Aethelwulf Meets with Kwenthrith Floki's Siege Towers Revealed Vikings Reach Paris The Attack Begins The Walls are Breached; the French Lose Hope Ragnar Knows Floki Killed Athelstan Vikings Attempt to Rip Open Gates Floki Melt Down Floki Curses the Gods Kalf and Lagertha Make a Pact Lagertha's Stealth Assault on the Bridge The French Counter - Attack Ragnar Hallucinates, Sees Gods The Vikings are Told of Ragnar's Death Vikings Attack Paris Ragnar Sets Sail for Home