<P> The fourth season consists of a double order of twenty episodes , split into two parts of ten episodes ; the second half premiered on November 30 , 2016 . The season follows the battles between Ragnar and Rollo in Francia , Bjorn 's raid into the Mediterranean , and the Viking invasion of England . It concluded in its entirety on February 1 , 2017 . </P>
when does the second part of vikings season 4 start
November 30 , 2016