Vikings: 8 Most Insane Fan Theories

8. Sigurd Still Lives!

The sons of Ragnar Lothbrok are some of the most influential and important people in the world of Vikings. They all attained a large degree of fame purely for being the children of the legendary figure, but that didn't stop some of them from biting the bullet rather quickly.

Season four saw the demise of the slightly lacklustre son, Sigurd Snake-in-the-Eye. After a heated argument with Ivar the Boneless, he ended up falling to his brother's axe and became the first son to join their father in Valhalla. But did he really?

Well, yes, he did. However, prior to the show's climax, plenty of fans were convinced that the axe didn't kill Sigurd, but instead put him into a brief coma. This theory stemmed from the fact that historically, King Aelle's daughter Blaeja - played briefly in the show by Caitlin Scott - married the snake-eyed figure, and the pair went on to have four children together.

The theory further claimed that Sigurd would rise back and take revenge on Ivar thanks to his new power in Northumbria after marrying the deceased King's daughter. Sadly, this theory never came to fruition, but it would have been interesting to see it play out.