Grimm

Nick (David Giuntoli) finds himself fighting a wildly different sort of nature freak in a desperate attempt to keep a volcano from burying Portland in lava. Meanwhile a pregnant Adalind (Claire Coffee) meets a powerful new ally (guest star Shohreh Aghdashloo) in Europe. Meanwhile, Juliette (Bitsie Tulloch) seeks out help after becoming overwhelmed by the latest side effect of her recovery - multiple memories of Nick showing up everywhere.

Mysterious cow mutilations and reports of glowing creatures put Nick (David Giuntoli) on a case that forces him to question the existence of aliens within the Wesen world. He also meets a strange UFO expert who seems to know more than he's letting on. Meanwhile, Nick digs further into the key, and Juliette's (Bitsie Tulloch) romantic memories of Nick start coming back in a big way.

Nick (David Giuntoli) discovers a muse-like Wesen (guest star Nora Zehetner, "Heroes") with the ability to influence those she gets close to - some with positive results, others with terrifying ones. Nick must find a way to get close without losing himself in the process. Juliette (Bitsie Tulloch) arranges a dinner date with Nick in the hopes of clearing the air, but their plans go awry as the case intensifies. Meanwhile, Rosalee (Bree Turner) takes her first visit to Aunt Marie's trailer.

Nick (David Giuntoli) and Hank (Russell Hornsby) discover a new kind of strange when they investigate suspects being found dead - for the second time. In Europe, Adalind (Claire Coffee) finds herself in the middle of a feud between Frau Pech and Stefania (guest star Shohreh Aghdashloo ) while working over the details of her pending transaction. Meanwhile, determined to remember every last detail to get things started once more, Juliette (Bitsie Tulloch) insists Monroe (Silas Weir Mitchell) share with her Nick's darkest secret - the world of Grimms and Wesen.

Just when things look like they're back to normal with Juliette (Bitsie Tulloch), Nick (David Giuntoli) is called to investigate a flurry of rage-fueled assaults happening all over Portland. He goes to Monroe (Silas Weir Mitchell) and Rosalee (Bree Turner) for help battling Portland's newest wave of "undead." As if that weren't enough, Captain Renard (Sasha Roiz) informs Nick that his brother Eric (guest star James Frain) is in town on family business. Meanwhile, Stefania (guest star Shohreh Aghdashloo) and Frau Pech methodically use their alliances with Adalind (Claire Coffee) to battle one another.

A panicked Juliette (Bitsie Tulloch), Monroe (Silas Weir Mitchell), and Rosalee (Bree Turner) enlist Hank's (Russell Hornsby) help in fending off a zombie hoard while trying to figure out what happened to Nick (David Giuntoli). Knowing the truth, Captain Renard (Sasha Roiz) takes measures to help rescue Nick from the clutches of his brother, Eric (guest star James Frain). Elsewhere, along with the help of the mysterious Stefania (guest star Shohreh Aghdashloo), Adalind (Claire Coffee) finds herself facing her most gruesome task yet in her effort to regain her Hexenbiest abilities.

Monroe (Silas Weir Mitchell), Hank (Russell Hornsby), Rosalee (Bree Turner) and Juliette (Bitsie Tulloch) track down a manic Nick (David Giuntoli) and do all they can to find him and reverse what's been done to him before he causes any more damage. Meanwhile, Captain Renard (Sasha Roiz) does his best to clean up the zombie fallout on all fronts - domestic and international. Elsewhere, the more time Adalind (Claire Coffee) spends with Stefania (guest star Shohreh Aghdashloo), the more disturbing things seem to get in her quest to regain her Hexenbiest abilities.

A series of disturbing crime scenes leads Nick (David Giuntoli) and Hank (Russell Hornsby) to the resurrection of an old feud that's all too familiar for Nick and Monroe (Silas Weir Mitchell). With the news of a royal family member's demise, several key players start to make their move. Meanwhile despite his recent trauma, Nick finds himself healthier than normal and Monroe and Rosalee (Bree Turner) talk about moving their relationship forward.

When Nick (David Giuntoli) and Hank (Russell Hornsby) investigate a drowning death with mysterious marks on the victim's ankles, they happen upon a group of water-bound Wesen with a deadly postcoital cuddle. Meanwhile, Rosalee (Bree Turner) starts unpacking her things at Monroe's (Silas Weir Mitchell), and Captain Renard (Sasha Roiz) makes a startling realization about the possible identities of the Royal Baby's parents.

Nick (David Giuntoli) and Hank (Russell Hornsby) are on the case as repeat instances of apparent vigilantism have whispers of an old Spanish legend making their way through a working-class Portland neighborhood. Elsewhere, Juliette (Bitsie Tulloch) learns the truth about Nick's mother. Meanwhile, Adalind (Claire Coffee) has a brief scare during her ultrasound.

Nick (David Giuntoli) faces his toughest challenge yet when he and Hank (Russell Hornsby) investigate a case that combines religious phenomenon with the dark dealings of the Wesen Council. Meanwhile, Rosalee (Bree Turner) is torn when Nick's case challenges her Wesen loyalties. Elsewhere, Captain Renard (Sasha Roiz) leaves town to tend to some "family matters."