Grimm (2011)

S4E21 Headache

As Nick and Hank delve into a brutal murder case, they inch closer to identifying the serial killer, but Wu finds himself in serious peril. After rejecting Monroe and Rosalee's proposal, Juliette forges a new alliance to pursue her quest for vengeance. Meanwhile, Trubel unexpectedly reappears in Portland, adding another layer of intrigue to the unfolding events.