Ep 16. The Believer

Nick and the gang are dealing with a new kind of wesen that has arrived in town - a religious fanatic. The "believer" wesen is convinced that it is on a holy mission to purge the world of impurities, and it is willing to do whatever it takes to complete its mission. Meanwhile, Renard is dealing with the fallout from the mayoral election, as his opponents accuse him of being involved in strange occult practices. As the believer's actions become more extreme, Nick and the gang must find a way to stop it before it causes irreparable damage.

In this episode, we see the return of several fan-favorite characters, including Trubel and Meisner. Trubel is recruited by Nick to help track down the believer, while Meisner provides some much-needed backup during a confrontation with the fanatical wesen. We also learn more about the believer's motivations and what drives it to commit such heinous acts. As always, the episode is filled with thrilling action sequences and plenty of suspense, as Nick and the gang navigate the dangerous world of wesen politics and try to prevent a catastrophe.

One of the major themes explored in this episode is the power of belief, and how it can motivate people to do both great and terrible things. The believer's strong convictions and unshakeable faith are what make it such a dangerous adversary, but they also provide insight into the human (or wesen) psyche and what drives us to pursue our goals. We also see how belief can be used to manipulate people, as the believer uses its influence to gather followers and carry out its mission.

Another key aspect of this episode is the continuing development of the show's many characters. Nick is still dealing with the fallout from his mother's death and the revelation that he is descended from a long line of Grimms, and we see how this has affected his relationships with those around him. Monroe and Rosalee are grappling with the challenges of starting a family in a world filled with danger and uncertainty, while Renard is coming to terms with the consequences of his actions during the election.

Overall, "The Believer" is a thrilling and thought-provoking episode of Grimm that offers plenty of action and suspense, while also delving deeper into the show's many complex characters and themes. With the return of some familiar faces and the introduction of a terrifying new wesen, it is a must-watch for fans of the series.