'Grimm' Season 4 Spoilers, Plot News: Juliette Determined to Keep 'Secret' Hidden From Nick

After its winter hiatus, NBC's "Grimm" makes a comeback this Jan. 16 with fans expecting a lot more thrills and chills.

We've witnessed the transformation of Juliette (Bitsie Tulloch) into a Hexienbiest, a secret she vowed to keep from Nick. It is understandable that she does not want Nick to know about this as turning into a Hexienbiest is the last thing in the world that she wants. Juliette will try her best to be her normal self while avoiding help from anyone, including Nick.

In an interview, Tulloch said she finds her character's transformation as a bit "shocking and weird." However, she understands that it is in line with the character. "I think it's honestly just too shocking and too weird for her, and she's scared. She doesn't know. This isn't like anything, and they've dealt with so much, but this is not like anything they've ever gone through," she said.

Tulloch also revealed that there will be an epic showdown between Adalind and Juliette. Adalind was the one who turned her into a Hexienbiest, and Juliette is determined to make her revenge.

Victor and Adalind will also be shown in the Pacific Northwest as they look for little Diana. It is still unclear, however, if they will be successful with their quest. As for Kelly Burkhardt appearing on the show this season, David Greenwelt and James Kouf, show creators, have confirmed that it is unlikely.

Elsewhere, a snake monster will be making terror. Stay tuned as the first episode for 2015, entitled "Wesenrein," airs on Jan. 16, 2015 on NBC.