The Northmen have returned. It is said they fly the black raven banner of King Ragnar Lothbrok.

Emperor Charles

Ragnar: I'm taking the boys with me to Paris.
Aslaug: They're too young.
Ragnar: It is my decision if they come or not. They are not too young to watch. In any case, they're safer with me than they were the last time with you.

Earl Kalf is dead.

Lagertha

King Harald: I would never give you any cause to kill me.
Bjorn: That is not for you to say. I may find cause or I may not. Who knows?

I would sup with the devil if he would show me how to achieve my earthly goals.

King Ecbert

We must hold Paris, whatever the cost. There's no alternative. No other choice. When my brother returns everything will be decided here.

Rollo

Ragnar: Are you one of the Emperor's daughters?
Yidu: My father was a merchant.
Ragnar: I know, you told me that before. I don't know you and you don't know me, yet I want to tell you my most terrible secrets.

Bjorn: You have such ambitions.
King Harald: What else is there? What are we here for except to achieve fame? Like your father. Isn't that what you want too?

Kalf: We heard you took yourself away into the wilderness. Why?
Bjorn: I went to find someone.
Kalf: Who?
Bjorn: Myself.

I can not stop thinking about death.

Ragnar

I once swore an oath before God and all his angels, that one day I would kill Ragnar Lothbrok.

King Aelle

If you want to go with my son, then go with my son. I will look after your child. We have one life, Torvi. So go and live it.

Lagertha

Vikings Season 4 Quotes

Einar: There Earl Kalf, you have your answer.
Kalf: And here right now is mine... archers!
Lagertha: I should have done this a long time ago, Einar.

Bjorn: Floki needed to be dealt with. You were incapacitated, I thought it was the right thing to do.
Ragnar: Did you also think that if I wanted him arrested, I would have done it a long time ago? But now you have made it public, and left me with no options.