'Grimm' season 4 might bring some 'Bad Luck' for Nick Burkhardt and Juliette Silverton in episode 14.Facebook/Grimm

Onscreen power couple Nick Burkhardt (David Giuntoli) and Juliette Silverton (Bitsie Tulloch) might no longer be together in NBC's "Grimm" season 4 as the makers are planning to tear them apart.

Fall finale of the supernatural drama revealed the new look of Silverton as a hexenbiest and the mid-season premiere titled "Bad Luck" will revolve around Burkhardt's struggles in making a decision about his life.

The detective still finds it difficult to believe that his beauty has turned into a beast and his confusions lead him to Henrietta (Garcelle Beauvais), who will advice him to kill his wife for safety, according to the trailers of episode 14.

But the makers of "Grimm" season 4 have some other plans for Burkhardt and Silverton. They want to guide the characters to two different roads and make them take their individual choices in life.

As per Tulloch, the new development is the story line is mainly due to the high demand of drama by the TV world. "Happiness doesn't make good [on] TV. Happiness for a time makes good TV, but you have to tear it apart," she told Zap2it, adding, "I don't know to what extent the writers are going to tear us apart this time. It could be permanent."

In a similar vein, Giuntoli shared his opinion over the good and evil representation of Burkhardt and Silverton in near future. According to him, it will be a great idea to watch the onscreen power couple taking up the role of god and devil.

Meanwhile, Tulloch revealed that her character might not bring any good fortune for rest of the characters in "Grimm" season 4. In fact, the new hexenbiest could cause some "Bad Luck" for them since she is not really aware of her powers.

"She's not a mean person, and this is definitely unwanted. As to whether or not she eventually grows accustomed to it and embraces it, that's an answer that will come up later in the series," she said.

So the fans of NBC's supernatural series can expect some really thrilling sequence in the mid-season premiere of the show.

NBC will air "Grimm" season 4 episode 14 titled "Bad Luck" on 20 March, Friday, at 8pm.