First of all, it is a must-watch series. Because it has taught us a lot of lessons in our life. You have to make some tough decisions if you want to be the king (Ragnar Lothbrook). He was my favorite character to watch in Vikings. Talking about the flow of the seasons it was fabulous the climax, suspense, thriller, the action was very perfect and up to the mark. I literally cried in the last two seasons of the episodes. 1] First I got emotional when my favorite character was killed. 2] When Ragnar's first son Bjorn Ironside dies, while watching I got really emotional and started to cry. It was really painful. It also gives them less of never trust too much.
Thank U,