Season 4: Aslaug
In season 4, Aslaug has grown tired of her marriage and is attempting to keep Ragnar under control by purchasing a young Asian woman who has caught Ragnar’s eye and makes her a servant.
When Ragnar leaves to raid Paris, Aslaug rules Kattegat on her own and continues her affair with Harbard when he returns. She has a breakdown though when she learns that he is also sleeping other women, gets drunk, and allows her youngest son to play with her adopted grandchild, resulting in her death when she is found face down in the river.
At the end of the mid-season, it is revealed that Ragnar never returned to Kattegat, his sons have grown into adults without him, and Aslaug has been ruling Kattegat successfully on her own.
Vikings returns on The History Channel Wednesday, November 30 at 9 p.m.