[4] In late August, Carlson Young was cast as Selina Golias, a character forced to hide the survivor of an attack that resulted in her boyfriend's death, resulting in Selina becoming the target of a Wesen "Rat King" who doesn't mind if she becomes collateral damage in a never-ending Wesen feud.

Billie is a Skalengeck described as "a fierce lieutenant in an up-and-coming Wesen street gang who is raising hell in Portland.

"[6] It was announced in November that Bailey Chase had been cast as Lucien Petrovich, "the leader of a Wesen revolutionary group."

Trubel tells the nurse her name is "Lauren Cole", matching one of the IDs and the registration of an expensive, weaponized motorcycle.

Nick, Hank and Wu are called to investigate a series of vandalism, murder, and kidnapping, where they find another claw mark.

Meisner, with Trubel's help, tries to recruit Nick to Hadrian's Wall at its Portland Command Center, funded by a branch of the federal government.

In Leipzig, Monroe's uncle Felix Dietrich is asked by Andrea Stroh to appraise books from the estate of Joseph Nebojsa.

Two Anubis Wesen from Black Claw kill Andrea, and Felix flees to Portland with one of the books – written by and for Grimms – to sell to Nick.

Nick and Monroe arrive at the spice shop and open the chest, but all are surprised by the identity of the "treasure" inside - a stick with extraordinary powers.

On the first night of the full moon, a man on his way to visit his mother crashes his car, leaving him to walk three miles.

Adalind is offered an opportunity to reunite with her missing daughter, Diana; while Eve discovers Black Claw is recruiting Renard.

Nick, Hank, and Wu investigate the death of a woman who aged seventy years overnight, only to learn they are dealing with a Wesen, operating as a photographer, who sucks youthfulness out of young people and regurgitates it as a goo.

An evangelical preacher named Dwight Eleazer has a tent revival unlike any other, using his Wesen identity to gain more believers.

Nick and Hank are called to the scene as things escalate when a group of "true believers" are hell-bent on saving the preacher and his flock by any means necessary.

When Brian Johnson's head is found under a bridge, Nick and Hank link it to a Japanese Wesen family whose son was previously killed by the victim.

Adalind accepts a job at her old law firm while Monroe and Rosalee volunteer to explore the tunnels under Nick's place while she is at work.

While Hank has dinner with Zuri Ellis, his former therapist, a drunk driver is repeatedly run over by a bird-like Wesen who then uses his tongue to dissolve and ingest his victim's bones.

Wu becomes involved in an altercation that results in the killing of a petty thief, he decides to go to the spice shop and figure out what is happening to him.

Meanwhile, Meisner and Trubel go to Diana's safehouse and find she was taken by Black Claw as leverage to convince Renard, Adalind, and Nick to join their cause.