No one is more surprised than this writer thatVikings, History Channel’s bloody, fantastical historical drama, has continued on for four seasons at this point, but here we are, with Ragnar (Travis Fimmel) and Bjorn (Alexander Ludwig) continuing on in their sanguine forge. The show has become a surprise hit with the television audience, and from the looks of the season 4 trailer that History Channel just released for the show, the narrative could not be at a more tense situation for the father and son. The trailer gives a sense of where the narrative will go - vague mysticism, brutal battles, murder, intrigue, romance, and the like - without giving up too much sense of how each of the ten episodes that will lead season 4 will unfurl. Even for a barely casual fan, things look to be hitting a fever pitch. Check out the trailer right below:

Here’s the official synopsis for season 4 ofVikings:

HISTORY’s hit drama series “Vikings” returns for a gripping fourth season led byTravis Fimmel, star of the upcoming filmWarcraft, onThursday, February 18 at 10 p.m. ET.The network has added four episodes to its initial 16 episode order. BeginningFebruary 18, a new episode will air everyThursdayfor ten weeks with the remaining episodes to air later in the year.

Season three culminated with the extraordinary battle in Paris, where Ragnar (Fimmel) seized victory from the jaws of defeat – but still returns to Kattegat dangerously ill. Thoughts of his death galvanize the forces who seek to succeed him as king, including his wife Queen Aslaug (Alyssa Sutherland) and his oldest son, Bjorn (Alexander Ludwig). Meanwhile, Lagertha (Katheryn Winnick) continues power struggles with her calculating, former second in command, Kalf (Ben Robson); Rollo (Clive Standen) betrays his Vikings heritage by remaining in Frankia and Floki (Gustaf Skarsgård) is seized for his brutal actions to the Christian priest Athelstan.

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