On the first night of the full moon, a young successful entrepreneur is driving on a deserted woodland road to go and visit his mother.
The next day, Nick (David Giuntoli) and Hank (Russell Hornsby), respond to a call about an injured man up on the road.
In the course of their investigation, Monroe and Rosalee (Bree Turner) mention a disease, Lycanthropia, that turns a Blutbad into an uncontrollable beast every full moon.
Club gave the episode a "B+" rating and wrote, "'Lycanthropia' takes one of the series' biggest leaps into that category as Grimm tells its first proper werewolf story, beginning and ending with loud howls in the light of the full moon.
Yet going past that point it's an episode that's refreshingly light on the other cliches, opting to take elements of that framework and tell a standard Grimm story.
And in the process, it also finds a way to introduce yet another complication to Team Grimm's life, one with potential for big dividends in future episodes.
Grimm Season 5 Episode 14 was mostly Case of the Week, with a good dose of fault lines being caused because Renard doesn't talk to people, apparently.
"[7] Christine Horton of Den of Geek wrote, "It was a bit of a mixed bag from the Grimm team this week, with a new case to solve, some ongoing storylines bubbling away in the background and a potentially interesting new development for one of our favourite characters.