Early look at season four of HISTORY’s hit drama series VIKINGS , premiering Thursday, February 18 at 10 p.m. HISTORY’s hit drama series “ Vikings ” returns for a gripping fourth season led by Travis Fimmel , star of the upcoming film Warcraft, on Thursday, February 18 at 10 p.m. ET. The network has added four episodes to its initial 16 episode order. Beginning February 18, a new episode will air every Thursday for 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) betray