NBC has released the promo for the eighteen episode of Grimm’s season 4 titled “Mishipeshu”, which will air April 17th, 2015.
04/17/2015 (08:00PM – 09:00PM) (Friday) : A NATIVE AMERICAN MYTH COMES TO LIFE — A homicide leads Nick (David Giuntoli) and Hank (Russell Hornsby) onto the dark and mysterious path of a local Native American power quest. Meanwhile, Juliette’s (Bitsie Tulloch) erratic behavior lands her on the wrong side of the law. At the spice shop, Rosalee (Bree Turner) and Monroe (Silas Weir Mitchell) are on a mission and call on Captain Renard (Sasha Roiz) for help. Reggie Lee and Claire Coffee also star.