Vikings
Season 4
20 episodes
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S04E01 A Good Treason
Entry to Valhalla eludes Ragnar but as he lies in his sick bed in Kattegat events unfold beyond his control. Bjorn orders the arrest of Floki for Athelstan's murder and in Paris, Rollo betrays his allies to strengthen his position. Meanwhile, in Hedeby, Kalf announces joint Earldom with Lagertha, but is Lagertha actually willing to share what once was hers?
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S04E02 Kill the Queen
Floki hopes to escape from Ragnar and Kattegat. Rollo makes great efforts in Paris to win over his new bride, Princess Gisla. King Ecbert orders his son Aethelwulf to rescue Queen Kwenthrith from opposing forces in Mercia.
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S04E03 Mercy
Floki faces the wrath of Ragnar. Intrigue prevails in the French Court as Rollo finds an unlikely ally. Kalf and Erlendur plot their ascent. Bjorn must fight a fierce opponent in the wilderness.
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S04E04 Yol
The Yule Log burns in the Great Hall in Kattegat and mysterious visitors are welcomed, among them a Norwegian King. King Aelle visits Wessex for Christmas and is concerned with how family relations are developing. In Paris, Rollo's future hangs in the balance - can he win over his new bride, Gisla, as a Papal Delegation arrives to arrange a divorce?
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S04E05 Promised
There's an air of betrayal at Court in Paris and in Wessex. Ecbert agrees to support Kwenthrith in Mercia, but is Ecbert a true ally? Ragnar confides in Yidu his darkest secret. Happiness comes to Lagertha and Kalf and a marriage is arranged.
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S04E06 What Might Have Been
Ragnar announces a raid on Paris at the Thing in Kattegat. The fleet is battered by a storm after it sets sail, but the greatest challenge for the Vikings lies ahead in Paris, where Rollo awaits. Meanwhile, Ecbert dispatches Aethelwulf and Alfred on a pilgrimage to Rome.
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S04E07 The Profit and the Loss
On the Seine, the Vikings attack with considerable force but can they breach Rollo's defenses? Meanwhile, Harbard, the mysterious wanderer, returns and causes a stir amongst the women of Kattegat.
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S04E08 Portage
The Vikings call Ragnar's leadership into question. Ragnar himself remains inscrutable and orders the fleet to beach at a cliff face where he unveils an ingenious plan. Rollo and Gisla have news that strengthens Rollo's position at the French Court.
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S04E09 Death All 'Round
The labours of the Vikings bear fruit as, within sight of Paris, they re-launch their fleet but this time with some formidable new structures that Floki has engineered. Aethelwulf and Alfred arrive in Rome and honours are conferred by Pope Leo. Relations are not so cordial in Wessex.
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S04E10 The Last Ship
A fierce battle between the Vikings and the French eventually comes down to Ragnar against Rollo and the outcome seals the fates of the two brothers.
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S04E11 The Outsider
Ragnar has returned to Kattegat and there are secrets to be revealed. He makes plans to return to Wessex to right past wrongs but finds that those who were once his closest allies now have plans of their own. Even the Lothbrok sons refuse to join their father's mission – except one.
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S04E12 The Vision
The Kattegat locals chide Ragnar that the gods have deserted him as he struggles to crew his voyage to Wessex. It's Bjorn who has charisma now as he prepares to fulfill his long-held dream to explore the Mediterranean in a sleek new boat built for him by Floki. By contrast, Ragnar must accept weathered boats and a crew he has bribed but when Aslaug foresees that the fleet will be lost in a vicious storm her warnings go un-heeded by Ragnar and her precious son, Ivar.
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S04E13 Two Journeys
Ragnar's fleet is shipwrecked and washes up on the Wessex coast, but without enough survivors to form a credible force, Ragnar and Ivar have a difficult decision to make. Rollo meets his Viking comrades again and can't resist the urge to join Bjorn's voyage, risking his marriage and his new Frankish identity. Ragnar too is taking a risk as he carries Ivar towards the Royal Villa in Wessex – throwing himself and his son upon the mercy of King Ecbert.
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S04E14 In the Uncertain Hour Before the Morning
Lagertha attempts to fulfill a long-held ambition. Ragnar negotiates an unexpected concession from King Ecbert.
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S04E15 All His Angels
Ragnar and Ivar plot against the Saxons and reach a new level of understanding.
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S04E16 Crossings
Bjorn's fleet sails onward and launches a surprise attack; back in Kattegat, Lagertha continues in her quest for power.
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S04E17 The Great Army
The Viking army begins to gather in Kattegat; Lagertha must remain vigilant in the absence of her son, Bjorn.
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S04E18 Revenge
Ragnar's plan comes to fruition; the Viking army lands on the coast of Northumbria.
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S04E19 On the Eve
The Viking army causes panic in the English countryside as King Ecbert and Aethelwulf plan the defense of the realm.
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S04E20 The Reckoning
Prince Aethelwulf finds himself subject to the Vikings' battle master plan; Ecbert remains behind with a plan of his own.
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