This series has a mixture of Vikings and a little bit of fantasy some say like Lord of the Rings.
Basically a guy looses his dad, but he isn’t the dad which we find out later. Now the whole idea of it is introducing him into the story back showing how he was here and his rivalry with his step-brother.
At the moment the story is finding the person who stabbed Bale. And the next episode promo shows someone attacking and all.
It can be both ways only time will tell!