The prophecy that was uncovered comes to pass when a dark force arrives in Portland with its eyes set on Diana. In an effort to protect her, Nick, along with Capt. Renard and Adalind, returns to the scene of his first investigation as a Grimm. Back at the Spice Shop, Monroe, Eve and Rosalee make a discovery that uncovers the origins of the mysterious stick. Meanwhile, Hank and Wu are called to a crime scene that is connected to the gang's greatest threat.

Cast: David Giuntoli, Russell Hornsby, Elizabeth Tulloch, Silas Weir Mitchell, Sasha Roiz, Reggie Lee, Bree Turner, Claire Coffee, Adam Hart, Chris Ihlenfeldt, P.E. Ingraham, Andrew Morgado, Douglas Tait