Grimm (2011)

S3E7 Cold Blooded

A chilling crime wave emerges in Portland, bringing an age-old urban legend lurking in the sewers to life, and Nick finds himself on the case. Across the ocean, Adalind encounters Prince Viktor, who is determined to exact vengeance on those behind his cousin Eric's death. At the same time, Captain Renard grapples with the fallout from a recent assassination attempt against him.