It's not often that an episode of television makes me want to slam my head into the wall repeatedly, but unfortunately Grimm Season 6 Episode 12 is just such an episode.

When reasonably intelligent characters behave in mind-numbingly stupid fashion, one finds it difficult to actually make it through the story.

It's practically impossible to count up the number of bad choices the protagonists made, but here are a few:

• Renard, Adalind, and Monroe held a loud discussion about Diana using the magic stick to reopen the mirror portal, well within earshot of Diana. Surprise! She reopened it, allowing Zerstörer to escape.

• When Team Grimm realized that Zerstörer was probably after the Magic Stick to fix his Magic Staff, Nick did not immediately hop in his car and leave the city.

• Nick, Hank, and Wu went to the precinct and stocked up on firearms, despite Nick's gun having zero effect on Zerstörer earlier.

• When the bullets (surprise!) had no effect on Zerstörer, the heroes engaged (or attempted to) in hand-to-hand combat, with predictable results. If bullets didn't work, why would punching work?

This episode also featured bizarre conclusions (all magic staffs are now one magic staff, and it's this one!), plot developments conjured out of thin air (Zerstörer is after Kelly, too!), and headscratchers (Adalind gets cell service in the basement of a cabin in the middle of the forest).

One thing that perplexed me was when Nick described the mirror realm as being "beautiful." It just looked like an ordinary, somewhat snowy forest to me.

Plus, the rampaging cannibals sort of put a damper on things. Maybe Nick is just a real fan of forests?

Then there were things like this:

It’s Hexenbiest blood, not Zauberbiest blood! There *is* a difference!

Adalind

• Permalink: It’s Hexenbiest blood, not Zauberbiest blood! There *is* a difference!

Yep! Good to know. That's the sort of thing that would have been intriguing three seasons ago when it might have been relevant.

And if there's a magic powder/spell/thing to protect Diana from evil, why in the world didn't Adalind or Renard think of that for her seasons ago?! And why has no one suggested such a protection for Kelly?

Speaking of Kelly, I sure hope they're going to explain why he suddenly became relevant to the plot because Diana's declaration came totally out of left field.

So, now, here's a list of What Zerstörer Wants in our realm (so far):

• Diana as his Child Bride (squick)

• Kelly (for... reasons?)

• The Magic Stick to complete his Magic Staff (seriously, why didn't the Crusaders just toss the Stick into Mt. Vesuvius or something?)

• To destroy everything (for the Evulz, naturally)

While Trubel made a welcome return (just in time for carnage), could she not have used a wonderful piece of modern technology called a phone and called her friends when she got a "horrible feeling" something might be wrong?

I also want to register a complaint about the way she sort of offhandedly mentioned that all the Black Claw cells were gone. Black Claw's rise in Grimm Season 5 was not handled well, but surely it deserved more recognition than that.

Of course, it's not like they had much time left to wrap things up before the series ends.

Whew. Okay. Taking a breath. Here are a few things that I liked about this episode:

Exploding eyeballs? Genuinely gross. Monroe making a Hitchhiker's Guide to the Galaxy gag? Actually pretty funny.

The hitchhiker didn’t need a guide to this galaxy. He just needed a Grimm!

Monroe

• Permalink: The hitchhiker didn’t need a guide to this galaxy. He just needed a Grimm!

Indeed, there were a number of entertaining quips in this episode. Check out our Grimm quotes page for a rundown.

Trubel is pretty much almost always a win in my book. Zerstörer, despite the silliness of his totally hot human form upgrade upon emerging into our world, evoked a measure of creepiness with how his only words were repeating what others said.

Now, let us take a moment and mourn the lost. I shake my fist at Joss Whedon for making it cool to kill the audience's favorite characters (I'm still not over what he did to Wash in Serenity).

It was understandable in the sense that the series is at an end, drama, loss, high stakes, and so on, but it just felt so sudden and pointless due to the lack of intelligent behavior earlier in the episode.

Of course, it would've made for a completely different story if Nick just drove off, leaving Zerstörer hiking after him. (It's not like Mr. Skullface can drive, right?)

A few final notes before I wrap things up and turn the discussion over to you, fellow Grimmsters:

• Althochdeutsch is a real thing; it's more commonly known as Old High German and was in use from around 700 to 1050 AD.

• I would not want to work at the Portland Police Bureau. That was the second time in as many years that a precinct was massacred.

• I'd really, really like to know who was making all those conveniently plot-relevant prophesies.

• Maybe instead of bullets, Nick should try stabbing Zerstörer with the Magic Stick?

You can always watch Grimm online to see episodes you missed before the series finale airs.

Grimm Season 6 Episode 13, "The End," is slated for Friday, March 31, 2017 at 8/7c on NBC.

What did you think of "Zerstörer Shrugged"? Were you upset to see Hank and Wu meet their maker? How do you predict the series will end? Let us know in the comments below!