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

Executive Producer David Greenwalt opened up 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.

At this year's Comic-Con International in San Diego, the stars and producers of "Grimm" also opened up about what viewers can expect this fall during Season 4, including Monroe's and Rosalee's honeymoon.

"We try. We try to have the honeymoon, but things are complicated in Portland these days. Things are turned upside down," said actor Silas Weir Mitchell, reports the Los Angeles Times' Hero Complex.

"I think the two had a quickie in the VW bus," actress Bree Turner added.

Fortunately for fans, actor Sasha Roiz revealed that Captain Renard is not "really" dead and he will make a return to the show next season.

Furthermore, viewers can look forward to finally meeting Captain Renard's mother and getting insight about the purpose of the mysterious keys that have been an underlying theme since the beginning of the show.

"We have another key this year, and year 5 for sure, and we will answer what those damn set of keys mean and what they lead to," said Greenwalt.

Season 4 of "Grimm" premieres on NBC on Oct. 24.