It doesn't seem like Nick does any research that the show doesn't show us. I've never seen him just know something that wasn't in an episode. It's always "let's talk to Monroe" or "we need to go back to the trailer."

Exactly. I can see how the Wessen Council could conceivably confine him indefinitely but Nick has no such resources and is completely unable to get a conviction. I imagine that, considering that he's now shown a bit of assertiveness to the council, that he might be able to negotiate the terms of Krampus' hand-over.

The show you might have been thinking of is X-Files. They almost never mixed their "monster of the week" with cannon episodes. It's only recently that dramas have started to mix up episodes on a weekly basis mostly so they can pack more story elements into a season and not drop the cannon for weeks at a time.

That's the single greatest post I've ever read on this site.

Good write-up but I do have to censure you on the guess that you made for Gelumcaedus' spelling. You should have at least gotten the suffix -dus bc it was a Roman creature that used the Latin word for Grimm.