Season 5 of “Grimm” might just see a different, more vengeful Nick as he copes with the loss of his mother and girlfriend. As if the series is not already dark as it is, it would get even darker as Nick prepares to go out with revenge.

Season 4’s finale saw Nick Burkhardt (David Guintoli) holding his girlfriend Juliette Silverton (Bitsie Tulloch) in his arms after she was killed by Trubel (Jacqueline Toboni). Trubel only did that in order to save him as Juilette had been turned into a hexenbiest. This will set Nick off on a path of revenge in season 5, and the preview for the season hints of a different Nick.

While Nick is off on a revenge spree, “Grimm” is also known for showing familiar monsters in the show. For season 5, the Loch Ness monster is said to be coming. How the Loch Ness monster will find its way into the show will be food for much speculation.

Madeline Brewer will also make an appearance in the show. The “Orange is the New Black” actress will appear as Billie Trump, according to TVLine. Her character is a lizard-like Wesen, which is called a Skalengeck. She is set to appear in episodes 6 and 7. Her appearance into the show bode of more bad things to come, as she would be part of a street gang who are, in reality, also Skalengeck.

Another “Orange is the New Black” cast will reappear in season 5 of “Grimm.” Elizabeth Rodriguez returns as FBI Agent Chavez. Carlson Young from MTV’s “Scream” will be guesting as well.

With so many things happening this coming season, “Grimm” will be more exciting and much darker than ever. Fans will have to wait and know if Juliette actually died last season, or as some speculated might still be alive, though that would make Nick’s revenge seem strange.

Season 5 of “Grimm” will premiere on Oct. 30, 9 p.m. on NBC.