[s3e10] The Dead Info

: Betrays his heritage by accepting the Frankish title of Duke and marrying into the royal family.

: Rollo stays behind in Francia as part of a deal with Emperor Charles. He is offered land and the hand of Princess Gisla in marriage in exchange for defending Paris against future Viking raids. Major Character Fates [S3E10] The Dead

The episode concludes the second Siege of Paris. After failing to breach the city walls through force, Ragnar Lothbrok uses a clever ruse to finally enter the Frankish capital. : Betrays his heritage by accepting the Frankish

If you were referring to a different show, here are other notable episodes numbered S3E10: Major Character Fates The episode concludes the second

: The Vikings leave Paris with immense treasure, but Ragnar remains severely weakened and ill on the journey home.

: Titled "Home," featuring The Governor's surprise attack on the prison.