Still, were left with two mysteries to ponder until the fall.

We start where we left off last week.

In light of this (snerk!

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Credit: Katie Yu/The CW

Deans the first to throw in the towel.

Ill do it until I die.

But how are we supposed to fix the freaking sun?

Kids, they say together, while Crowley mutters, Im so glad the world is ending.

Youre our brother, Cas.

I want you to know that.

If the balance is restored, maybe the universe will survive.

Chucks reluctant, but everyone else is on board.

Turns out, the way to kill Gods sister is to build a bomb of light.

One soul equals 100 suns, and if they can collect enough, they might have a chance.

And the Winchesters werent able to bust enough Caspers to build the weapon.

And then its Billie to the rescue!

The 100,000 she offers are enough to make the Darkness-killing weapon.

Dead folks, kind of my thing, she brags.

Ah, but theres a catch.

And it cant be carried; the bomb goesinsidethe carrier.

Naturally, Dean steps up.

Dean just gives him a manly shoulder clasp.

Poor Sam cant even look at him when its his turn for a farewell.

They hug, both knowing its the last time theyll see each other.

Open bar, choir, Sabbath cover band, and Gary Busey reading the eulogy.

Then he looks around at the tombstones.

And for my ashes, I like it here.

You know, as far as eternal resting places go … She bumps into an old woman whos come to the garden to feed the pigeons.

The womans husband has died, and her sons talking about putting her in a home.

But you know family.

Even when you hate them, you still love them, she says.

The divine hamster in Amaras brain starts to turn in its wheel.

NEXT: Who ordered the summertime cliffhangers?

When Dean shows up, Amaras ready to talk and to listen.

Youre family, Dean tells her.

(Chuck) doesnt want you dead.

He doesnt want any of this.

Dean compares it to the many fights he and Sam have had that always ended in forgiveness.

And when everything goes to crap, thats all youve got: family.

So Chuck appears, and they make long-overdue apologies.

She was furious that Chuck made the universe because it meant that he needed something other than her.

But what youve made, its beautiful.

It took me a long time to see that.

She knows they cant go back, but she wishes they could be family again.

They clasp hands, and the sun bursts back to life.

Amara heals Chuck, who in turn removes the bomb from Deans chest.

damage hes caused over the years.

He advances on her and taunts that shes never going to shoot him.

Its Mary Winchester, and shes in the nightgown she was wearing the night she died in 1983.

The last word of the episode is Dean asking, Mom?

Does she know who she is?

Does she knew her sons?

Is this amonkeys pawsituation?

Beyond that, itll be interesting to see were the show goes from here.

And what stakes will be higher than God fighting his sister for the continued existence of the entire universe?

What can season 12 possibly throw at us?

I dont know about you, but I cant wait to find out.