With Ragnar now king, he faces more foes than ever in Season Three but out of all the rivals, there2s one Viking in particular he should watch out for: Erlendur. The only surviving child of King Horik, his entire family slaughtered during a brawl between the King of Denmark and the legendary Norse ruler, during the Season two finale. Ragnar, impressed by Erlendur's idea of going to farm in England spares Erlendur's life.

Battles, treachery and power grabs rage on in Vikings Season Four. Ragnar2s return to Kattegat following his shameful defeat in Paris escalates tension among his sons. Determined to save what remains of his legacy, Ragnar recruits Ivar for a perilous voyage to England, where he plans to attack the Saxons. Meanwhile, a prophecy that a woman will one day rule Kattegat deepens Aslaug and Lagertha2s feud.