Lagertha is forced to take action; In Kiev, although Oleg continues to be friendly, Ivar is aware of the threat which Oleg poses to the vulnerable young heir to the throne; Bjorn has answered the call and come to the aid of an old enemy.

Cast: Katheryn Winnick, Alexander Ludwig, Alex Høgh Andersen, Alicia Agneson, Andrei Claude, Kristy Dawn Dinsmore, Danila Kozlovsky, Lenn Kudrjawizki, Marko Leht, Lucy Martin, Kathy Monahan, Jordan Patrick Smith, Ferdia Walsh-Peelo