The "Grimm" episode "Natural Born Wesen" clearly illustrates why Wesen haven't already taken over the world and turned humans into their slaves. Most Wesen are just like humans: They want to live in peace. As such, they have created their own code to live by that allows them to keep peace with humans. When the code is broken, Wesen have their own brand of punishment for dealing with it.
The episode also continues from where the last episode, "Face Off," left off. Nick (David Giuntoli) has just taken the potion that, hopefully, will allow him to break the spell between Renard (Sasha Roiz) and Juliette (Bitsie Tulloch). If he succeeds, he will have his nice warm spot back next to his girlfriend in bed.
Rosalee reverses the cat-scratch spell
Juliette completely freaks out at seeing Nick's beet red body writhing on the floor and wants to call 911. When Monroe (Silas Weir Mitchell) mentions the cat scratch that started it all, she loses her mind even more. So he explains it in terms of crazy pheromones, or as he puts it, pheromaniacal pheromones.
Thankfully, Nick wakes before Juliette loses her mind. The next step is for Renard and Juliette to drink Nick's blood. Monroe pulls Nick into another room to draw the blood so Renard and Juliette don't have to know what they are about to drink. They take their "medicine," none the wiser. Time to go home and forget this ever happened.
Juliette goes on a trip
Forgetting isn't easy for Juliette. Once she steps into her house, her brain begins going haywire. Her entire living room becomes a deep, dark hole in her mind. The hole is just two steps from the door, the door is locked, and the stairway to her left never ends. She is trapped within a two-foot area and accidentally drops her phone in the hole, as well.
The hole contains white sparks and scary voices, causing her to cower into submission. When she hears the phone ring, she finally snaps out of it and takes a few tepid steps over the hole until the floor returns. She finally seems to be sane again and thanks Nick once she answers the phone.
Not so fast: That voice from the hole calls her later that night to say, "I just want you to know the truth," complete with white sparks. That sounds like what Nick said when he told her the truth of what he is before she lost her mind. Will she remember who Nick really is?
Wesen criminals break the code
A large portion of the episode dealt with three Wesen who decide to start robbing banks using their true forms to make people think they are wearing really well-made masks. Monroe happens to be at the bank to see it all go down. Unfortunately for them, that action is against Wesen code.
Now that Nick, Renard, Hank (Russell Hornsby), and Monroe are all on the same page, fighting criminals such as these becomes a whole lot easier. They no longer have to balance hiding the truth of Wesen criminals while deciding whether to use law enforcement, Grimm, or Wesen tactics against them. When the criminals kill two humans during their next robbery, each of the team members quickly make a decision on which route to take.
The Wesen Council's way
Nick and Hank opt for the police tactics of arresting the pair after they kill their third member when he tries to break from the group. Renard and Rosalee (Bree Turner), however, opt for Wesen tactics; they each call the Wesen Council with information on the culprits. When Nick and Hank drag them into the precinct, a council member shows up with a gun and shoots them dead on live TV.
The moral of the story? Don't mess with Wesen code, or you will become a very public example of what not to do, for all Wesen to see.
'Grimm' Episode 'Face Off' Recap: The Truth Comes Out