Most Vikings head back to Kattegat, but Rollo stays behind. Emperor Charles offers him land, the title of Duke , and Princess Gisla’s hand in marriage if he agrees to defend Paris against future Viking raids.

As they sail home, Ragnar reveals to Floki that he was awake during the confessions and knows the truth: "You killed Athelstan" .

The French allow the "dead" King into the cathedral for his funeral mass. Suddenly, Ragnar , kills the Bishop, and takes Princess Gisla hostage. He forces the guards to open the city gates, allowing the Viking army to pour in and finally sack Paris. The Aftermath and Betrayal

You can watch the full episode on platforms like Amazon Prime Video or Apple TV. Vikings Season 3 Episode 10 Review: The Dead - TV Fanatic

After failing to breach the walls of Paris, a gravely wounded Ragnar requests a and a proper burial inside the city. Believing him dead, his closest allies—Lagertha, Rollo, and Floki—each visit his coffin to confess their deepest secrets, ranging from love and jealousy to Floki’s admission that he killed Athelstan. The Fall of Paris

The season 3 finale of , titled "The Dead," is famous for Ragnar Lothbrok’s legendary "Trojan Horse" ruse to conquer Paris. The Great Deception