Wu's bite wound brings out his primal instincts on Grimm. "The Taming of the Wu" is the 19 episode of the show's fifth season.
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Nick struggles with how to move forward now that his life has been thrown into chaos on the season premiere of Grimm. "The Grimm Identity" is the first episode of the show's fifth season.
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Wu, Nick, and Hank's investigation leads them to a Wesen bounty hunter on Grimm. "Marechaussee" is the 12th episode of the show's fourth season.
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Nick and Hank investigate a murder in a haunted house on Grimm. "Death Do Us" is the 11th episode of the show's fourth season.
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Nick gathers the entire team, including Wu in order to find Monroe on Grimm. "Tribunal" is the tenth episode of the show's fourth season.
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Nick and Wu investigate a shooting on Grimm. "Face Off" is the 13th episode of the show's second season.
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Sgt. Wu works for the Portland Police Department.
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Grimm Quotes

I think there is a choice, even when there appears to be none. But it's the reaction that determines whether the choice is good or bad, not the person who makes it.

Eve

Adalind: Don't you see what's going on?!
Renard [confused]: I thought I did!
Adalind: You *moron*! It's our daughter! She's doing this, not us!
Renard: What are you talking about?! Diana?!
Adalind: Oh, God, do you *really* think that I just all of a sudden decided you were the hottest guy on Earth and couldn't wait to take my clothes off and hop into bed with you!?
Renard [somewhat sheepishly]: Well, I am the new mayor.
Adalind: *I* didn't vote for you.