HISTORY | 9:00 pm

Season 5 of this hit historical drama climaxed with a ferocious battle for Kattegat that ended with ruthless Ivar the Boneless (Alex Hogh Andersen) fleeing the field of combat, leaving his brother Bjorn Ironside (Alexander Ludwig) to be crowned the rightful king by his mother, Lagertha (Katheryn Winnick). As the sixth and final season opens with a two-hour premiere, Bjorn struggles to fill his late father's royal shoes while wrestling with the nagging suspicion that power inevitably overshadows moral considerations.