On the season finale of Vikings this new character is introduced:
And so far Vikings has been as accurate as a series can be about an actual historical time and still be a show. But I'm afraid that the Tale of Ragnar's sons has ended, and so, who is this new character? He appears to be an English monk, but he has a sword of a Viking, as shown when he's having sex with that lady and the end of the episode. Who is this?