Hank assist Juliette, Monroe, and Rosalee fighting the zombie hoard, while Renard tries to rescue Nick from Eric. Meanwhile, Adalind turns to Stefania once more for help regaining her magical abilities.
Juliette leads the hunt for Nick, who is still under the zombie influence. Meanwhile, Renard deals with the aftermath of the zombie attack, and Adalind pursues her quest to regain her Hexenbiest abilities.
Nick and Hank investigate an ages-old feud that has erupted in Seattle, a feud that Nick and Monroe are well-acquainted with. Meanwhile, the death of a royal family member has repercussions across the world, and Monroe and Rosalee discuss the next step in their relationship.
Nick and Hank investigate a drowning murders and encounter a group of aquatic Wesen. Meanwhile, Renard tries to confirm the identity of the Royal Baby's parents, and Rosalee moves in with Monroe.
Nick and Hank investigate a Spanish legend seemingly come to life when a vigilante strikes in a working-class neighborhood. Meanwhile, Juliette learns the truth about Nick's mother and Adalind has an ultrasound with unusual results.
Nick and Hank investigate a case of demonic possession which leads them to the Wesen Council. Meanwhile, Renard leaves town to deal with the situation in Europe.
While Nick and Hank deal with an urban legend in the sewers, Renard responds to the attempt on his life and Adalind meets with Prince Viktor in Europe.
While Renard is in Europe looking for Adalind, Nick and Hank deal with a serious of missing teenagers tied into an old Wesen legend of the Krampus. Meanwhile, Monroe asks Juliette for her help surprising Rosalee for their first Christmas together, but things don't go as he planned.
A Wesen with a gift for healing endangers others when he uses his abilities. Meanwhile, Juliette helps a friend who is being domestically abused, Hank invites his physical therapist on a date, and Renard tracks down Adalind.
While Nick and Hank investigate a gang-related murder with ties to both the Wesen community and Hank's new girlfriend Zuri, Juliette discovers the truth about her friend and goes to Rosalee for advice.
Nick and Hank investigate the murder of an Army veteran and discover someone is seeking revenge on several people involved in a military contract in Iraq. Meanwhile, Monroe meets Rosalee's mother and sister, and Adalind starts to recover her powers.
While Nick and Hank investigate a killer who takes his victims' scalps, Adalind unexpectedly goes into labor and Juliette maintains contact with Nick's mom. Meanwhile, Monroe gets a visit from his parents.
Nick and Hank track down the Wesen killer, who has taken an interest in Nick. Meanwhile, Monroe deals with the aftermath of his parents discovering that he plans to marry a Fuchsbau.
Nick and Hank have to protect Wu's friends when they become the target of a Wesen, without giving away the existence of Grimms and Wesen to Wu. Meanwhile, Adalind gives birth to her daughter and regains her Hexenbiest powers.
Nick and Hank are caught in the middle when the Wesen Council turns its attention to Portland. Meanwhile, Wu deals with recent revelations and Renard discovers that his Resistance spy has been compromised.
Nick and Hank investigate a traveling carnival where someone is suspected of having committed a double murder. Monroe and Rosalee get involved and Rosalee ends up going undercover. Meanwhile, in Europe the Resistance continues to try helping Adalind, but at a terrible cost.
Nick's mother Kelly returns to help Adalind escape Europe with her baby. Meanwhile, Monroe and Rosalee prepare for their wedding.
Nick's mother Kelly brings Adalind from Europe and teams up with her son to protect the Hexenbeist... unaware that Viktor has sent someone to bring Adalind's child back to him.
While Nick and Hank investigate a female killer who targets Wesen, Adalind prepares to make a new alliance to ensure her child's safety.
While taking Trubel on a ridealong, Nick and Hank investigate a young woman's murder that rings a chord with their passenger. Meanwhile, Adalind hopes to regain her daughter.
While Trubel encounters a father-and-son team trying to deliver something to Nick, Nick and Hank encounter Verrat agents trying to recover rare Wesen-related artifacts. Meanwhile, Adalind continues to try and find her child, forcing Renard to put her under surveillance.
As Monroe and Rosalee get married, something happens that could threaten Nick and Juliette's own relationship. Meanwhile, Adalind executes Viktor's plan so that she can be with her baby, and Renard discovers what she's up to.