The cast and crew of Grimm revealed a few hints about the upcoming third season at their Comic-Con panel on Saturday.

To start, the show's main character Nick (David Giuntoli) will be in a dark place when Grimm premieres in October.

"He's going to be a bit of a monster," said executive producer David Greenwalt. "He won't know who his friends are." Nick was last seen in the season 2 finale getting infected by a green slime and turning into a zombie. See the recently released video of Giuntoli in zombie makeup here.

Sergeant Wu (Reggie Lee) will be dealing with his own brand of demons. The police sergeant will be faced with a Wesen at the beginning of the new season.

"We've got a bad one coming for Wu that will cause major problems for him," said executive producer Jim Kouf. Lee added that Wu is "going to suffer greatly, and then possibly recover. We're not sure yet."

Greenwalt also teased some of the types of Wesens fans will expect to see in season 3, including alligators in a sewer, "sexy-scary" mermaids and a faith healer.

As for some of the other characters, it will be revealed that Captain Sean Renard (Sasha Roiz) is able to speak Russian. Roiz said that the character's Russian language ability is going to come in handy very soon.

Enstars previously reported that Monroe (Silas Weir Mitchell) and Rosalee (Bree Turner) would be getting married in the new season, and both actors confirmed at the panel Saturday that this would be the case.

"I think it's nice to know it's on the horizon, but the fun of it is the difficulty getting there," Mitchell admitted, "to what is hopefully felicitous nuptials."

Greenwalt concluded the panel by teasing two more details for the new season, including the addition of a new character that has "its own Grimm situation," as well as the appearance of a second mysterious key. This would suggest that the key mystery, which was introduced in season 1, could finally get some resolution.

Grimm season 3 is set to premiere Friday, Oct. 25 at 9 p.m. on NBC.

Watch the Grimm Comic-Con panel in full here:

Tags: Grimm NBC Grimm Spoilers