Follows the adventures of the sons of legendary Viking, Ragnar Lothbrok, at the beginning of the Viking Age.

Journey into a thrilling ancient world in this epic new series about history's bravest and most brutally fearsome warriors; Vikings. Ragnar, a would-be Viking chieftain, longs to fulfill his destiny as an explorer and conqueror, alongside his ambitious brother Rollo and loyal wife Lagertha. But as Ragnar leads daring raids in distant realms across the ocean, treacherous forces in his Norse homeland conspire against him. Faced with shocking betrayals...

The people of the small village of Wessex stand up and fight against the Viking invasion that threatens the entire land.

Armed with more power and greater responsibility, Ragnar's desire to seek out and conquer new kingdoms remains unquenchable. Loyalties shift as friends turn to foes and unlikely alliances are formed. Amidst all the war and political confusion, not a single soul is spared in the name of supremacy.

Battles, treachery and power grabs rage on in Vikings Season Four. Ragnar's 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 Lagertha's feud.