In Grimm Season 4 Episode 17, Nick, Hank, and Sergeant Wu investigate a strange murder in which the victim was frozen solid. They immediately suspect a Wesen is responsible, and learn that the Wesen needs to steal body heat from others in order to survive. The situation only grows more serious when they realize that there are three of these rare Wesen loose in the area. At the same time, Monroe deals with leftover emotions and trauma from his kidnapping and near-murder at the hands of the Wesenrein. Meanwhile, Captain Renard is still struggling with his mysterious phantom bleeding and powerful, disabling visions that strike without warning. Juliette is also determined to hunt down and kill Adalind, as well, while Adalind wants Prince Kenneth to do the same thing to Juliette. Will Juliette manage to kill Adalind? How will Adalind deal with the fact that her clothes no longer fit right? Will Monroe be able to cope with the lingering trauma of his Wesenrein experience? And will Nick and his team track down these heat-stealing Wesen before they kill again? Find out the answers to these questions and much more when you watch Grimm Season 4 Episode 17 right here at TV Fanatic!