Season 04, Episode 1 – “Thanks for the Memories“
Nick adjusts to the loss of his Grimm powers and tries to figure out how to deal with Trubel as the fourth season opens. Meanwhile, Wu has an unpleasant flashback; a new group of Wesen come to Portland and steal people’s memories; Capt. Renard fights for his life; and Adalind’s desperation to find her child lands her in Prince Viktor’s clutches.
Season 04, Episode 2 – “Octopus Head“
Nick ponders whether he wants his Grimm abilities back as he and Hank continue to track a Wesen that’s stealing memories from its victims. Meanwhile, Adalind learns she has a connection to Nick; and a recovering Capt. Renard has a mysterious visitor.
Season 04, Episode 3 – “Last Fight“
Nick investigates a vicious slaying at a boxing gym while dealing with repercussions from a strange vision. Elsewhere, Monroe and Rosalee make some headway in their quest to help Nick regain his powers; and Adalind gets an unusual visitor.
Season 04, Episode 4 – “Dyin’ on a Prayer“
Nick and Hank investigate a case involving clay-induced asphyxiation; Wu’s suspicions about Trubel intensify; Elizabeth makes a major breakthrough in the pursuit of restoring Nick’s powers; Monroe and Rosalee’s inter-Wesen marriage sparks a cultural backlash; and Adalind hopes her mysterious visitor will help her escape the dungeon.
Season 04, Episode 5 – “Cry Luison“
A woman claims a very persistent, talking wolf drove her to the point of madness when she’s questioned by Nick and Hank after committing a deadly crime. Meanwhile, Nick and Juliette wonder if getting his Grimm powers back is worth the sacrifice of a normal life; at the same time, Bud hopes Trubel can help with a wesen-related issue; threats against Monroe and Rosalee intensify; and Adalind’s perilous trek to retrieve her daughter continues in Austria.
Season 04, Episode 6 – “Highway of Tears“
Nick is anxious to become a Grimm again in light of the attack on Monroe and Rosalee; at the same time, he and Hank are called to a stretch of highway that acts as a staging area for a horrifying Wesen ritual. Meanwhile, the sudden arrival of an old friend surprises Trubel; and in Vienna, Viktor meets with a completely broken Adalind.
Season 04, Episode 7 – “The Grimm Who Stole Christmas“
A bizarre string of home invasions lead to an even stranger Wesen phenomena; Monroe plans a special Christmas surprise for Rosalee; and Truble comes to a life-changing realization that impacts everyone.
Season 04, Episode 8 – “Chupacabra“
Nick and Hank find themselves investigating the gruesome trail left behind by a blood-sucking creature known as the chupacabra, which was brought to Portland by an unsuspecting traveler; at the same time, Monroe and Rosalee get ready to leave on their long-overdue honeymoon; Viktor and Adalind plan a trip of their own; and Wu prepares to confront Nick about what he has been seeing.
Season 04, Episode 9 – “Wesenrein“
The Wesenrein act on their many threats against Monroe and Rosalee’s marriage; at the same time, Nick and Hank bring Wu to a place where he’s sure to find the answers he’s seeking; and Juliette attempts to come to grips with her new reality.
Season 04, Episode 10 – “Tribunal“
Nick gathers the whole team, including Wu, to track down Monroe and return him to Rosalee. Meanwhile, Monroe’s life hangs in the balance after his abduction by the Wesenrein; and Juliette discovers more about her new reality as a Hexenbiest.
Season 04, Episode 11 – “Death Do Us Part“
Captain Renard seeks assistance from a mystical woman from his past; at the same time, Nick and Hank investigate a shocking homicide at an abandoned residence that is allegedly haunted, leading many locals to believe a ghost is the culprit.
Season 04, Episode 12 – “Marechaussee“
Nick and Hank investigate a series of murders that lead to a mysterious Wesen bounty hunter; Juliette’s meeting with Henrietta results in more disturbing news than expected; and Viktor makes his way back to Portland with Adalind.
Season 04, Episode 13 – “Trial by Fire“
Nick reluctantly asks an old foe for help investigating an arson that appears to have Wesen origins. Meanwhile, Viktor teaches Adalind the effectiveness of well-played diplomacy; and Juliette finds herself in a confrontation sooner than expected.