'Grimm' finale: Nick's worlds collide and it gets dangerous

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It's been a hauntingly fun season on "Grimm." But before we call it a wrap on our favorite spooky procedural, there's still the season finale to consider.

Here's what we learned on Friday's (May 18) episode.

[Spoiler alert]

Nick (David Giuntoli) and Juliette ( Bitsie Tulloch): The day Nick had long-since feared has finally arrived. His hand is forced and he needs to explain to Juliette that he's a Grimm. Needless to say, she doesn't believe a word he's saying, mostly because he sounds completely crazy. Nick's attempt to prove that he's not lying starts off with the best of intentions, but it ends up with Juliette in the hospital and in dire straits.

The search for the gold coins - The hunt for the precious items we learned of earlier in the season continues. This time it brings out Akira Kimura ( Brian Tee), a man with a connection to the all-powerful Yakuza mob. Kimura's efforts leaves a trail of death and destruction in his wake. But, in the end, there is one person he can't get past.

The Woman in Black - For much of the episode, a mysterious woman ( Mary Elizabeth Mastrantonio) seems to be lurking in the shadows just behind Nick. When the police try to stop her, it appears that she's been studying up on her martial arts and they are powerless against her. This all leads to a final scene when she kills Kimura while saving Nick. But this moment of heroism pales in comparison to the reveal that she might just be Nick's mother.

See you next season. But until then, may we suggest you sleep with the lights on.
Photo/Video credit: NBC
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