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Pilot Nick Burkhardt's life is completely transformed when his family's legacy is revealed to him and he discovers that he is a Grimm, a monster hunter who can see the creatures for what they really are.
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Bears Will Be Bears A barbaric family history is revealed when Nick and Hank investigate a case of breaking and entering. Meanwhile, Nick assigns Monroe to look after Aunt Marie.
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Beeware The station is abuzz as Nick and Hank are called to a case where an innocent flash mob results in a gruesome homicide. As Nick delves further into the investigation, he learns more about his unique family history, and finds himself at odds when he and Hank are assigned to protect a dark character from his recent past.
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Lonelyhearts After investigating a strange cluster of female deaths and disappearances, Nick sends Monroe undercover to get a whiff of a hypnotic suspect. In the meantime, a stranger shows up looking to avenge the death of his friend at the hands of a Grimm, but he'll have to get past Captain Renard.
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Danse Macabre Nick and Hank's investigation of a dead high school teacher leads them to the school's outcast, Roddy. Nick realizes that there's more to Roddy than meets the eye, and enlists Monroe's help to get through to the troubled teenager before he exacts revenge on the students who wronged him. Meanwhile, Nick learns that his presence is beginning to affect the creature world.
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The Three Bad Wolves Nick is called to a suspected arson case, which exposes a longstanding family feud that brings Monroe face-to-face with characters from his troubled past. While Monroe wrestles with restraining his wild side, it's up to Nick to keep everything from going up in flames.
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Let Your Hair Down A mysterious homicide deep in the woods leads to Nick and Hank reopening a long-cold missing persons case. When Nick suspects this abducted person might be a feral creature, he asks Monroe to help remind this wild child of her human nature.
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Game Ogre A prison escapee returns to Portland and seeks revenge on everyone who got him arrested. Nick notices his unusual strength and high tolerance of pain and calls Monroe to help put his rampage to an end.
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Of Mouse and Man Nick and Hank investigate a murder victim left in a dumpster, and soon discover that the trail leads to an abusive boyfriend, an arrogant lawyer, and a meek junk yard owner. Meanwhile, Juliette notices someone watching her and Nick, and Monroe gets a message from the creature community.
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Organ Grinder After some of Portland's homeless youth go missing, Nick discovers a black market supplying the Grimm world with human organs. As the investigation continues, Nick and Juliette befriend a pair of homeless siblings, Hanson and Gracie, whose friends have gone missing.
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Tarantella Nick and Hank search for a dangerous heartbreaker who leaves behind a gruesome corpse and apparently her finger. Nick and Juliette's safety is threatened when the creature world begins to discover his identity.
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Last Grimm Standing An underground fight club where monsters participate in blood battles is tied to a murder that Nick and Hank are investigating.
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Three Coins in a Fuchsbau A failed robbery leads Nick and Hank to powerful rare coins. Meanwhile, a suspect in the case may have information regarding the death of Nick's parents.
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Plumed Serpent Nick finds himself in the heated world of Portland fire dancing where he meets a woman who might just be too hot to handle.
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Island of Dreams Nick looks into a theft and murder at a spice shop and discovers that it was owned by a Wesen, and that the thieves were after a dangerous drug. Meanwhile, Hank falls under Adalind's sway and Wu gets caught in the middle.
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The Thing with Feathers Nick tries to take Juliette on a romantic weekend but soon becomes embroiled in a case involving a neighbor couple. Meanwhile, Monroe and Hank both find themselves romantically involved with new women.
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Love Sick Nick finally discovers that Hank is dating Adalind, the same Hexenbiest responsible for Marie's death. Meanwhile, Monroe and his girlfriend Rosalee have to secretly help Hank and Wu, and Renard gets a visit that threatens his position among the creature leadership.
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Cat and Mouse Nick and Hank find a murder crime trail backtracks abroad; when Nick finds Monroe and Rosalee are harboring the prime suspect, an apparent conflict arises between police duties and his inner Grimm.
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Leave It to Beavers As Nick delves into the trailer's weapons cabinet and his inner Grimm, the investigation of a dead construction worker leads him into a long-standing conflict in the creature world.
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Happily Ever Aftermath Nick and Hank are called to investigate the mysterious death of a wealthy matriarch, after her stepdaughter loses everything in a Ponzi scheme. Meanwhile, Juliette does some digging into the mysterious death of Nick’s parents in an effort to help him find closure.
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Big Feet When Juliette stumbles upon a horrifying murder, Nick learns the suspected creature is unable to return to a human form; Hank sees something inexplicable.
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Woman in Black As Nick delves deeper into his life as a Grimm, a trail of grotesque murders reignites the search for the elusive gold coins.