Monroe and Rosalee make the final preparations for their wedding day, but Adalind is hatching a scheme of her own.
Nick receives a treasure trove of books and items from another Grimm, who is being hunted by the Verrat.
Nick enlists Monroe and Rosalee to train Trubel on the world of Wesen, but the young Grimm can't stay away from the action.
Nick's world is rocked when a mysterious drifter named Trubel arrives in Portland.
The gang circles the wagons to defend Adalind's baby against an attempted kidnapping from The Royals.
A double homicide leads Nick (David Giuntoli) and Hank (Russell Hornsby) to a traveling carnival where the performers are not what they seem. To get a better understanding of what's going on behind the scenes Monroe (Silas Weir Mitchell) and Rosalee (Bree Turner) go undercover. On the wedding front, Monroe has a really important question for Nick. In Austria, an invaluable member of the Resistance makes the ultimate sacrifice to help Adalind (Claire Coffee).
Nick (David Giuntoli) and Hank (Russell Hornsby) find themselves thrown into the middle of an ancient battle and things heat up when the Wesen Council decides to get involved. Monroe (Silas Weir Mitchell) and Rosalee (Bree Turner) fill everyone in on early Wesen history. Meanwhile, Sgt. Wu (Reggie Lee) is still reeling from the events he recently experienced. As things heat up in Europe, one of the Resistance’s most trusted allies gets compromised as he tries to protect Adalind (Claire Coffee).
A horrible new predator creeps into Portland with its sight set on a young expectant couple who are close friends of Sgt. Wu (Reggie Lee). Nick (David Giuntoli) and Hank (Russell Hornsby) must figure out how to deal with Wu as the investigation escalates. Meanwhile, Adalind (Claire Coffee) prepares for a special delivery while her enemies are hot on her trail.
Monroe (Silas Weir Mitchell) fights an impossible battle to convince his parents (guest stars Dee Wallace and Chris Mulkey) to embrace the life choices he’s made. Meanwhile, Nick (David Giuntoli) turns to Juliette (Bitsie Tulloch) to help him figure out the Wesen aspect of his cop-killing scalper investigation. On the Royal Baby front, Captain Renard (Sasha Roiz) learns new information that forces him to contact Adalind (Claire Coffee) in the interest of keeping her and the baby safe from Viktor (guest star Alexis Denisof).
Nick (David Giuntoli) and Hank (Russell Hornsby) investigate a cop killer who scalps his victims. Meanwhile, Juliette (Bitsie Tulloch) begins to communicate with Nick’s mom via email and Adalind (Claire Coffee) finds herself much closer to delivering her baby than she previously thought. Elsewhere, Monroe's (Silas Weir Mitchell) parents (guest stars Dee Wallace and Chris Mulkey) decide to surprise him and Rosalee (Bree Turner) with an early arrival to Portland after learning some exciting news.
Nick (David Giuntoli) and Hank (Russell Hornsby) are called to the gruesome murder of a veteran working in home security. During their investigation, they discover this might be one of several revenge killings regarding a horrifying cover-up involving members of the army and military contractors. On the domestic front, Monroe (Silas Weir Mitchell) accompanies Rosalee (Bree Turner) during her long overdue reunion with her mother and sister. In Europe, Adalind (Claire Coffee) sees hints of what she thinks might be her powers returning.
Nick (David Giuntoli) and Hank (Russell Hornsby) are called to the scene of a gang-related homicide. The case escalates as Zuri (guest star Sharon Leal), Hank’s physical therapist, and her brother get caught up in the investigation. Meanwhile, Juliette (Bitsie Tulloch) seeks advice from Rosalee (Bree Turner) in dealing with the news that her friend is Wesen.
Nick (David Giuntoli) and Hank (Russell Hornsby) investigate a Wesen "healer" whose ability holds risks that far outweigh its rewards. Meanwhile, Juliette (Bitsie Tulloch) takes in a friend when domestic issues escalate and Hank makes a move on his physical therapist Zuri (guest star Sharon Leal). Elsewhere, Captain Renard (Sasha Roiz) finally tracks down Adalind (Claire Coffee) and has a stern warning for her.
After a string of delinquent teens go missing, an old Wesen tale of an evil Santa who brings more than just a lump of coal may be the prime suspect. The investigation intensifies as Nick (David Giuntoli) and Hank (Russell Hornsby) take things a little too far. Meanwhile, Monroe (Silas Weir Mitchell) enlists Juliet (Bitsie Tulloch) to surprise Rosalee (Bree Turner) for their first Christmas together with unintended results. Elsewhere, Captain Renard’s (Sasha Roiz) tour of Europe brings him closer to tracking down Adalind (Claire Coffee).
As a deadly crime spree begins to surface, a century-old urban legend takes shape in Portland's sewers and becomes Nick's (David Giuntoli) latest case. In Europe, Adalind (Claire Coffee) meets Prince Viktor (guest star Alexis Denisof), who's come to bring those responsible for his cousin Eric's demise to justice. Meanwhile, Captain Renard (Sasha Roiz) responds to the recent attempt on his life.
The Anubis are dog-like Wesen descendants of the ancient Egyptian gods of the same name.
The Lebensauger is a leech-like Wesen who coerces its victims through fear and intimidation, then sucks the blood from their bodies.
The third season ends with the arrival of Monroe and Rosalee's wedding day. Meanwhile, Nick and Juliette come to a surprising realization that could have lasting effects on their relationship and Adalind's actions have disastrous consequences.
A "Hollentier" is described.
A vicious Wildesheer serial killer targets a tough-as-nails war veteran.
The Grimm team research the meaning of Gelumcaedus.
A monstrous predator goes after a couple who are friends with Wu, and Nick and Hank must figure out how to deal with a delicate situation after Wu witnesses something unexplainable. Meanwhile, Adalind is pursued by enemies as she prepares to give birth.
Grimm's Bitsue Tulloch discusses the epic season 3 finale and the perpetual bane of Juliette's existence, Adalind Schade.
Nick and Frank visit Bree and Monroe to see if they've ever heard of Wesen Gangs.
After infiltrating a shoplifting ring, Trubel discovers the crime syndicate's Wesen roots.
Nick and Hank introduce Trubel to her new world by taking her on a ride-along, during which they investigate the murder of a young woman. Elsewhere, Adalind makes a discovery that may help her reclaim something she lost.
Nick, Hank and Trubel encounter three aggressive Verrat assassins in the hospital parking lot, and Trubel proves that she can definitely hold her own in a street brawl.
Grimm's Sasha Roiz talks about the action-packed finale and Renard's Season 3 journey.
An expectant mother is brutally attacked by the mythical baby-eating Filipino monster known as "Aswang."
The Aswang are vicious Filipino Wesen who must consume their first-born grandchild in order to prolong their own lives.
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