An enemy wearing a friends face.

Heartbreaking courage and sacrifice.

This week gave us yet another stellar episode ofSupernatural, so lets recap.

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Credit: Dean Buscher/The CW

She wheedles him to kick off the weathered box, and he complies as he nibbles her neck.

We dont see whats inside.

So its true, she breathes, then stabs her Nazi lover to death.

The Men of Letters send their regards, she hisses.

You go, Delphine!

(And also,Game of Thronesshout-out?)

Its a little early for Nazi trivia, particularly without caffeine, Dean points out.

Its wreckage was never recovered.

Unfortunately, Castiel isnt himself these days.

Then Dean calls, and Castifer whispers, No barking.

Its show time, and puts on the Castiel growl.

They make plans to travel back in time to retrieve it.

Sam reluctantly agrees to stay behind as long as Cas doesnt let Dean out of his sight.

No surprise that Sams startled when Cas slogs into the bunker, drenched.

I cant believe I lost it, Castifer says.

At a look from Sam, he corrects himself.

I cant believe I lost Dean.

The captain instead guesses Deans a spy or an AWOL soldier.

Flash Gordon here will remain under guard until we reach the shore, he says.

This confuses her because her ward shouldnt work on angels.

(Seriously, the clues are all there, guys!)

Meanwhile, Petey keeps asking Dean questions about the future.

Who wins the 1944 World Series?

Then Petey wants to know wholl be the next president.

No, uhhh, Truman, Dean says.

Delphine agrees to hand it over because she trusts him, Man of Letters to Man of Letters.

Petey jumps in again.

Me, the girl, the rest of the crew?

Im just trying to get your story clear.

Yes, Dean finally says as the sub starts to dive to avoid the Germans.

However, it requires the power of an archangel, so Sam rejects it.

Back on the sub, Delphine opens the box to reveal…a really old piece of wood?

She warns him not to touch it because no human can survive full contact for long.

Then Petey speaks up again.

When do we win?

Months, years, decades?

Years, Dean says.

The sub dives to max depth, and everyone goes silent to keep any sounds from traveling underwater.

Delphine returns from ward removal and unbuttons her jumpsuit to reveal that the last ward is a chest tattoo.

Kill me, she says, holding out the knife.

Dean rests the knife over her tattoo as a depth charge explodes and rocks the whole boat.

The props department mustve had fun finding the weirdest ingredients and biggest butcher knives they could for this scene.

It can be fatal, but Sam will do it to save Dean.

Then Cas starts to bray with laughter, his voice and demeanor changing.

I will touch your soul just because you asked so nicely, he says.

Ill just say, Dean and here he puts on Castiels growl Dean, he knew the risks.

He wouldnt take no for an answer.

Then he digs into Sams chest, and Sam bellows.

Gaaaaaah, how much are you loving Misha Collins playing Lucifer-as-Castiel?

Every second hes on screen is a DELIGHT.

Looks like theres a struggle over whos controlling the Cas ship.

However, hes got to turn the control back to Lucifer because only the archangel can time travel.

(But Cas can time travel, right?

Or is that ability gone with his lost-then-sort-of-found grace?)

Shes shocked that its her former lover, the bald Nazi.

If you want a friend ofthe Thuleto stay dead, burn the body, he says.

This gets Deans attention, particularly when the German continues that his whole crew has extraordinary abilities.

Dont, and theyll be blown to hell so the Germans can get the object from the seabed.

Then Delphine once again asks Dean to kill her so he can teleport out.

He instead asks if they can use the Hand of God to save her and the sub.

Forget abouthiswar; he wants to help them now.

We are supposed to die.

Let us do it with a purpose, she says.

Shes going to ensure Dean gets home and they take out the German destroyer.

More depth charges explode, and Delphine takes action, picking up the Hand of God.

When theyre back in the bunker, Sam yells, Dean!

Cats out, Castifer smirks and power-blasts Dean against a wall.

Castifer says donning this grim face of angelic constipation (way harsh!)

has been a nightmare.

He thought the Winchesters were insufferable as mortal enemies, but working with you?

Thats the soul crusher.

Castifer gleefully unwraps the piece of the Ark, but nothing happens.

Well, whod have thought the Hand of God would turn out to be a one-hitter?

And we end with the brothers recovering on a dock.

Then Sam asks Dean about his trip to the past.

Dean says he didnt actually do anything.

I was just a witness, he says, still shaken.

Because I cant think of one.