When you watch Grimm Season 4 Episode 1 online, you're immediately tossed into the fallout of the Season 3 finale. Renard is in critical condition in the hospital, Weston Steward is dead, and Nick has lost his Grimm powers. Even though Nick can't see Wesen anymore, he finds himself investigating a case that has "Wesen" written all over it after an octopus-headed creature sucks the memories out of a scientist and murders his girlfriend. He is forced to use Trubel as his "seeing-eye-Grimm", despite the fact that he wants to keep her out of it. Monroe and Rosalee offer to help Nick figure out what Adalind did and try to reverse it. Sgt. Wu faces his own demons as he tries to understand what he saw last season - which is made no easier when he finds one of Nick's Grimm diaries in Trubel's room. Hank tries to support him as best he can without blowing his cover. An FBI agent investigating Weston Steward's death is revealed to be a Steinadler, and she shows a particular interest in Trubel. In the hospital, Captain Renard fights to survive against the odds after suffering horrific injuries. Discover how it all comes together when you watch Grimm online.