Grimm calls them Wesen — German for “creature” — the mythology-inspired monsters hiding in plain sight on the NBC thriller, going into its fourth year of giving fans a reason to stay home Friday nights. This season picks up right where the May finale left off, with Nick (David Giuntoli) having lost his Wesen-spotting powers — which means he’ll have to lean on Trubel (Jacqueline Toboni) to function as his seeing-eye Grimm. Below, EW can exclusively reveal this quartet of new baddies that will haunt slayers Nick and Hank when Grimm returns for Friday, Oct. 24:

Gedächtnis Esser: Or what Syfy channel would call: “Manopus!” The part-man part-octopus Wesen has four tentacles that burrow into its victim’s head. If that weren’t lousy enough, the creature steals your memories and leaves you with dementia. “A lot of what we do is try to explain real-world problems, like in this case, identity theft,” says executive producer Jim Kouf. “Our best Wesen ideas come when we have an emotional core that explains something in life.”

Image zoom

Schinderdiv: “How do you explain people who are only out for themselves and do anything to achieve a goal?” asks executive producer David Greenwalt. If you answered, “A Schinderdiv!” then you are correct! This is your basic demon beast with long-bottom fangs (which must make shaving pretty difficult). This wesen is meant to embody ruthlessness and selfishness.

Image zoom

Heftigauroch: We’re starting to suspect all these names are actually German micro-brews, but Kouf says the Heftigauroch is actually a bull-like Wesen that morphs into rage when provoked. In the show, he’s a boxer who is very peaceful and doesn’t want to fight. Yet when pushed too far he becomes … yup, a raging bull. “When a bull is brought into a ring it doesn’t necessarily want a fight requires being hit with picadors to get mad — this Wesen requires the same treatment,” Kouf says.

Image zoom

Golem: The producers are cheating a little as the Golem is not a Wesen, but a creature from the Jewish religion. Made of clay and 10-feet high, he’s made to protect the meek but is dangerous to try to control. “The twist with our Golem is how it gets destroyed,” Kouf teases. Our bet: Industrial-sized pottery wheel.