VIDEO: Sneak Peek - GRIMM's Halloween Episode on NBC

In this Friday's Halloween episode of NBC's GRIMM titled 'LA LLORONA,' despite the enthusiastic anticipation of the city's residents for Halloween, a series of horrifying child abductions make their way to Portland, quickly spoiling the holiday spirit.

Nick (David Giuntoli) and Hank (Russell Hornsby) join forces with Valentina Espinosa (guest star Kate del Castillo, Telemundo's "La Reina del Sur"), a mysterious detective from Albuquerque, to help find and capture the elusive suspect. Juliette (Bitsie Tulloch) joins their investigation, acting as the precinct's fill-in Spanish translator. The more Nick digs into the case, the more he realizes the pattern of the kidnapping matches those in the famed Hispanic horror story "La Llorona," a story with its roots intertwined with his own family's history. Meanwhile, Monroe (Silas Weir Mitchell) celebrates the holiday in fine style as he teaches the neighborhood bullies a lesson. Sasha Roiz and Reggie Lee also star. The episode airs Friday, October 26th at 9:00 pm/ET on NBC. Get a sneak peek below!