<Tr> <Td_colspan="2"> ← Previous Season 3 </Td> </Tr> <Tr> <Td_colspan="2"> List of Vikings episodes </Td> </Tr> <P> The fourth season of the historical drama television series Vikings premiered on February 18, 2016 on History in Canada . The season consists of a double order of 20 episodes, split into two parts of 10 episodes; the second half premiered on November 30, 2016 . The fourth season concluded in its entirety on February 1, 2017 . </P> <P> Filmed in Ireland, Vikings is inspired by the tales about the Viking Ragnar Lothbrok, one of the best - known mythological Norse heroes and notorious as the scourge of France and England . It portrays Ragnar as a Viking farmer who pioneers the first daring raids into England, and eventually becomes a Scandinavian king, with the support of his family and fellow warriors: his brother Rollo, his son Björn Ironside, and his wives--the shieldmaiden Lagertha and the princess Aslaug . The fourth season follows the battles between Ragnar and Rollo in Francia, Bjorn's raid into the Mediterranean, and the Great Heathen Army's invasion of England . </P>

When does part 2 of vikings season 4 start