NBC has released the synopsis for episode #514 of Grimm, which you can check out below. The installment, titled “Lycanthropia,” is officially described as follows:
A FORGOTTEN WESEN DISEASE PLAGUES A PROMINENT FAMILY – ANN CUSACK GUEST STARS – Following a brutal attack in the woods, Nick (David Giuntoli) and Hank (Russell Hornsby) stumble upon a terrifying Wesen disease that may be the inspiration for the modern-day werewolf myth. Meanwhile, Adalind (Claire Coffee) is offered an uneasy alliance that may help her get back what she wants most. Elsewhere, Eve’s (Bitsie Tulloch) investigation uncovers a surprising revelation. Silas Weir Mitchell, Sasha Roiz, Reggie Lee and Bree Turner also star.
Grimm “Lycanthropia” airs Friday, March 25, at 9pm on NBC.