NBC's Grimm began shooting its 100th episode last week, and so it was time for a celebration for the dark and twisty show inspired by Grimm's Fairy Tales, which recently began airing its fifth season. On the Grimm set in Portland, The Grimm 100th Episode Ceremony and Cake Cutting brought the cast and crew together with notables from Portland, and even Oregon Gov. Kate Brown, who was on hand to congratulate and thank the show for spending over $250 million in her state.

In a Blastr exclusive, interviews with the executive producers and cast delved into Juliette's death, a major development in the season four finale, as well as what's ahead for Nick and his Scooby crew. While Grimm fans are three episodes into the new season, the 100th episode is set to air in March.

Some Grimm reveals from the cast and crew:

Creator and executive producer Jim Kouf: “When we went to Comic-Con on the first year when we had no idea how long this series would run, we said, 'If we ever get to episode 100, we'll answer the question about the keys,' never thinking we'd actually ever have to answer because what show ever goes to 100? Then when we got to 90 and 91 and 92, we go, 'Uh-oh, we'd better figure out what those keys are.' So, I mean, we always had an idea, but now we had to actually do it. But yeah, we're going to deal with the keys in 100.”

The keys have popped up here and there during the series, but they've remained a mystery as to what they might open.

Executive producer/director Norberto Barba: For the 100th episode “Nick and Monroe go on a big trip because of the keys, and they find where the keys are. We see what the keys fit and we find out what's in that, and it's mindblowing. It will change things.”

Barba also promised we'd meet a Loch Ness Monster in one of the episodes ahead.

David Giuntoli (Nick Burkhardt): “I think when we first saw Nick, he was deeply off the rails. But things are settling a little bit... I love going deep and dark and it informs all the decisions as an actor. There's no guessing. I know exactly where he's coming from. I like the dark side.”

“Finding this character has been really fun, and the writers have given me such a really glorious set of emotions to run through...her relationship with Nick is at the forefront. I'm very anxious to see what the fans have to say about how it all progresses. It's a massive journey that happens for her internally, just emotionally, and then relationship-wise.”

Reggie Lee (Sgt. Wu): "This season is going to be about the Wesen uprising...[The writers] like to put us in a whole bunch of trouble every single season. So, every one of us will be in trouble. It's going to be fun. It's a very ensemble piece this time. It's funny, because Nick has his own thing going on now, so there's a lot of things that have to be adjusted. 'Cause we're trying to figure things out without him sometimes, and that's different, because he has to tend to his baby and Adalind.”

Bree Turner (Rosalee): “As we inch toward the 100th episode, [Rosalee and Monroe's friendship with a Grimm] becomes so palpable. Obviously, since they've been in Nick's inner circle, a lot of bad shit has gone down. But I think what's happening now with this new big bad, our terrorist group of Wesen that is approaching Portland, we're talking centuries of stuff that has been buried. It's now coming out to the surface and I think Monroe and Rosalee are really looking at themselves as the faces of this brave new world. Like forget this old school Spanish Inquisition s***. Like Grimms, just regular people, Wesen...we can all live together under one big rainbow. So, they really are fighting for that, but at what cost?”

Silas Weir Mitchell (Monroe): “It was interesting, because I think in the fourth season, we kind of went seven episodes in one direction and seven episodes in another direction, and then seven episodes [in a different direction], following a lot of blind alleys. Some of them paid off, but I feel like there was a narrative disarray maybe. And, this year, there's a very clear, season-long story arc. It plays out in a very well-structured way, which means it's not one straight line. But it is one overarching story that is told in a good way, with a lot of little sub-plots. But they're all kind of linked to the same thing, which I think is really important.”

Russell Hornsby (Hank Griffin): “Hank has embraced his badassery a great deal. If you're going to do it, you have to stand strong and tall. He's come a long way from being scared of things that go bump in the night and creatures that transform in front of you to having no fear. I think audiences appreciate and enjoy the evolution of characters.”

Jacqueline Toboni (Trubel): Trubel “is totally evolving. When she left in Season 4, she went and started her own journey and teamed up with a new storyline, and I think when she comes back to Portland, and she is coming back, she's kind of the connector between this new world and this family she left behind...Nick, unfortunately Juliette, and Monroe and Rosalee."

Sasha Roiz (Captain Sean Renard): “The show runners keep coming up with the most incredible, insane storylines. Every year, you think, 'What are they going to do now?' And then they come up with something. This something is really quite thrilling. It's going to consume season five and it's the whole vesen uprising thing. It's really quite dark and wonderful.”

And, of course, Bitsie Tulloch, who played the recently deceased sweet turned evil Juliette, returned for the celebration to talk about the show: “It was a good 89 episode run and I think when you're going into Season 5 of a show and you're in the 100+ episodes range that you really do need to take things up and [Juliette's death] was a really great way to do it. It was very fun for me to play...I'm very grateful to our fans because we wouldn't have made it this far without them. The sci-fi fans are just the best to have. Very loyal and very smart.”

As far as the excitement locally regarding the show's successful run, Portland and residents have every right to be thrilled with the show. In the five years Grimm has been filming, the show has spent over $250 million throughout the state and, along with shows like Portlandia, inspired other filming, which has increased film and video production 70 percent. At the celebration, Portland officials announced that a street will be named after the show, NW Grimm Way, and a building will be called the Grimm Building. Beyond that, Portland mayor Charlie Hales declared last Tuesday as "Grimm Day." Not bad, as happy endings go.

Check out some of the happenings from the 100th Episode celebration in the gallery below!