The Season 3 finale of Vikings , titled features Ragnar Lothbrok executing a daring "Trojan Horse" ruse to finally conquer the seemingly impenetrable city of Paris . Plot Summary
A small party of Vikings stays behind to maintain a presence in Frankia . Emperor Charles offers Rollo land, the title of Duke, and the hand of his daughter, Princess Gisla, in exchange for his loyalty and defense of Paris against future raids . "Vikings" The Dead (TV Episode 2015) - IMDb Vikings - Season 3Eps10
While sailing home, Ragnar finally reveals to Floki that he knows Floki was the one who murdered Athelstan . The Season 3 finale of Vikings , titled