Ep 4. Lonelyhearts

In Grimm season 1 episode 4, titled "Lonelyhearts," Nick and Hank investigate a series of mysterious deaths linked to a dating service. The victims are all found with their hearts missing, and the prime suspect is the founder of the dating service, who has a peculiar quirk - he is a Wesen who transforms into a mouse-like creature.

As Nick and Hank delve deeper into the case, they discover that the dating service is a front for a Wesen trafficking operation, and that the founder, being a powerful Wesen himself, is taking advantage of unsuspecting humans. Meanwhile, Nick starts to feel increasingly alienated from Juliette as his work as a Grimm takes up more and more of his time.

The episode has a tense and thrilling atmosphere, with plenty of action and suspense. The investigation takes Nick and Hank to some unexpected places, and they encounter a variety of Wesen along the way, including a sinister spider-like creature and a scorned, vengeful woman who transforms into a bird of prey.

As always, the show does a great job of weaving together supernatural and human elements to create an engaging and suspenseful story. Viewers will also get a deeper insight into the world of Wesen, with more information revealed about their society and customs.

Overall, "Lonelyhearts" is a great episode that's sure to satisfy fans of the show. With its blend of mystery, action, and supernatural elements, it's a perfect example of what makes Grimm such a unique and entertaining show.