'Grimm' Season 3 spoilers from Comic-Con 2013Add to Favorites | Grimm
"He's definitely going to the darkside," showrunner David Greenwalt revealed. "And he may get another face of green spit before it's over."
While Season 3 is only in the very early stages of production, Giuntoli said he's enjoying the changes dying has brought about in Nick. "It's very nice to get to be angry," he said. "There's gonna be a lot of fighting in this first episode [back]."
"I've read three scripts of this new season," Giuntoli revealed. "I'm only a couple episodes ahead of everybody else."
Even the showrunners don't know much more than that at this point. "We know a little bit more than David about where we're going but we're about two weeks ahead of the cast," Greenwalt revealed.
"I really think it's nice to know what's on the horizon but the fun of it is the difficulty getting there," co-star Silas Weir Mitchell (Monroe) revealed. But he did discover that his character is headed down the aisle at some point with love interest Rosalee ( Bree Turner) -- by reading it on TVGuide.com. "I look forward to the obstacles on route to what is hopefully a felicitous nuptial," Mitchell said.
"I think it's great fun. I like the slow reveal," co-star Sasha Roiz said about playing fan favorite mystery man Captain Renard. "I like keeping the audience guessing, I like keeping myself guessing. I look forward to all the various machinations he has in store."
"I am in Season 3 campaigning for a first name and a second costume," co-star Reggie Lee (Sgt. Wu) joked and made the crowd go wild.
The panel included a look at the opening scene from the Season 3 premiere in which Monroe and Juliette ( Bitsie Tulloch) attempt to escape the zombie horde that descended on them in the finale.
As for one of the show's biggest ongoing mysteries -- what's up with the key? -- Greenwalt warned the crowd they better not hope for answers any time soon. "As soon as we figure it out, [the keys] will be fully explained," Greenwalt joked. "You might see a second key this season. Eventually it will lead to something really big and unbelievable."
Check out the full panel below:
And here are some choice clips: