Grimm (2011)

S01E17 Love Sick

Nick uncovers the shocking truth that Hank is in a relationship with Adalind, the Hexenbiest linked to Marie's demise. At the same time, Monroe and Rosalee find themselves in a position where they must covertly assist Hank and Wu. Meanwhile, Renard receives an unexpected visitor whose arrival jeopardizes his standing within the creature hierarchy.