"Grimm" fans can look forward to an all-new season filled with new plots, Wesen creatures and more Trubel once the series returns to NBC this fall.

Executive Producer David Greenwalt opened up to Zap2it at the 2014 summer TV press tour, dropping hints about how Season 4 will start and the role that Trubel will play in the upcoming season.

Season 3 of "Grimm" ended with a daunting cliffhanger as Nick Burkhardt's lost his Grimm powers and Captain Renard apparently died.

According to Greenwalt, Season 4 picks up right where the finale left off and Nick will suffer from an identity-crisis due to his loss of powers.

"If they could cure him and if he could submit to that process, which is going to be horrible -- or at least shocking -- does he want to be a Grimm again?" said the EP. "This will go on longer than the zombie thing [at the end of Season 2], but not just interminably. Long enough to really mine the issues around it."

Greenwalt also promised that "Grimm" fans will get to see more of Trubel in Season 4, however her role may not last for long. Greenwalt said that he and EP Jim Kouf have not decided how many episodes Trubel will appear in, but that she at least will be in "the first several." He added that, "That's a thing that's going to have to organically reveal itself."

Earlier this summer, Greenwalt talked about a new evil Wesen that will be introduced on the show in the first couple of episodes who "steals your identity but in a very disgusting way," reports the Los Angeles Times' Hero Complex.

According to TV Guide, a character named Gedächtnis Esser, aka Octo-Man, can steal someone's memories by attaching his tentacles to their head, leaving his victims either dead or with a severe memory loss.

"This guy is ruthless and sophisticated -- a high-tech spy who is involved with some highly placed military intelligence personnel," Greenwalt told TV Guide.

In addition to Octo-Man's many victims, he will also target Trubel, the new feisty Grimm in town, which "will leave her in a very dire state," said Greenwalt.

Season 4 of "Grimm" premieres on NBC on Oct. 24 at 9 p.m. ET.