Nick Burkhardt (David Guintoli) and Adalind Schade (Claire Coffee) will be reuniting in the upcoming "Grimm" Season 6. But before anything else, Adalind has to convince her daughter Diana, played by Hannah Lloyd, that the Grimm poses no threat to her family, and would have to win against Juliette/Eve, played by Bitsie Tulloch. Though the upcoming season could see a character coming back to life, it could also mark the end of the show.
Coffee shared with Parade during an interview that her character has developed a close relationship with Nick in "Grimm" Season 5. She wants him as a father for Diana in order to make their family complete, though her daughter thinks otherwise. She also shared that her major challenge would be competing for the Grimm's heart, now that Juliette is coming to remember who she is.
However, the love triangle between Nick-Adalind-Juliette is nothing compared to the events that would unfold after the discovery of the Crucifixion Stick. In "Grimm" Season 5, the stick was revealed by the Seven Keys in which Nick tried to keep hidden. Since they have discovered the power of the stick after it saved Nick from death and healed his friend Monroe, there are speculations that it could resurrect someone from the dead.
Meanwhile, according to The Los Angeles Times, "Grimm" Season 6 could be the last installment for the show. Guintoli said that it was a major success for the show to hit their 100th milestone, and if they reached the sixth season, then viewers would probably see a conclusion for the characters. He did ensure though that the finale would be marked by excitingly major events.