They sing together, friends and enemies, the brothers who will soon kill each other.

If we die, I doubt I shall see you again, she says.

You will be in your heaven, which is not part of this world, I think.

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Credit: Jonathan Hession/History Channel

They kiss, the first last kiss of the day.

The war drum sounds.

Hvitserk races into battle.

He has told his brother, Ivar, that he has no regrets.

Though he does wish he had children.

I will have children, Ivar promises, And my children will populate the earth.

Maybe hes mad, and maybe Hvitserk made a mistake following this brother.

He meets his enemy Ubbe in battle, andthatbrother holds a blade to his neck.

But he cannot go through with it.

Others are not so lucky.

But they are overrun: Her father is killed, and then she falls, too.

Such loss on this day!

Sad irony, perhaps, that he dies in battle with his own Viking brother.

Harald hesitates only to say how little he wanted this; then he slices his brothers neck open.

I will see you in Valhalla, Harald tells Halfdan.

This is not the most sorrowful loss on the field of battle.

Before the fighting, Harald asks his wife Astrid to tell him of her sorrow.

She finds her old lover, the queen, in the middle of the battle.

You have to kill me, she tells Lagertha, Otherwise, we will kill you.

She knows Astrid didnt betray her, knows there is still such love there.

But the Northmen live inevitable lives, know their fates belong to higher powers than them.

Astrid steps forward in violence, and Lagerthas sword kills her and her unborn child.

We see events far away from the battle.

He promises to make Eyvind the lawgiver: You will have your power and authority.

But the cycle cannot be broken.

Soon Thorgrim is dead in the water, and soon the fighting will begin.

Could this be the end of Floki?

Has he come so far, only to return to the violence of his homeland?

Ivar thrives upon the violence.

Hes never seemed stronger.

He throws away his crutch, seems to walk or even fly.

And the deaths continue.

His line ends here, and this is merely collateral damage as this era comes to an end.

In Kattegat, Margrethe visits the Seer.

The noble shieldmaiden has never shied from a fight before.

But what death has not claimed, time has begun to destroy.

Bjorn finds Lagertha in Kattegat, hair turned white.

Meanwhile, a living ghost of the past is sailing home.

See Rollo, hero and traitor, Northman and Frank, pagan and Christian.

His hair seems lighter, too.

What tides carry him home?

What tidings will he bring to his ravaged family?

Must brother always fight brother?

Is there hope for the Viking world?