'Grimm' Series Finale: Captain Renard Teams Up With the Good Guys (PHOTOS)

It’s a devil of an ending! Supernatural drama Grimm wraps its six-season run on Friday, March 31, with a green-eyed, skull-headed monster from Hell—a fallen angel with deep connections to the Bible—trying to take psychic savant Diana (Hannah R. Loyd) as his child bride. It’s a situation so dire that Diana’s wicked dad, police captain Sean Renard (Sasha Roiz), must team up with the good guys (Bree Turner, Claire Coffee, Roiz and Silas Weir Mitchell, below).

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“Everything tragic that can happen will happen,” warns executive producer David Greenwalt. “The episode is bold and extremely emotional.” And it led to a cast-wide meltdown. “When we received the script for the last episode, we were all texting each other and sobbing,” says David Giuntoli (Det. Nick Burkhardt, above). “We started Grimm as a bunch of broke, unknown actors and have supported each other through marriages, births, deaths, our own weird version of celebrity—everything but plastic surgery!"

Grimm, Series Finale, March 30, 8/7c, NBC