'Grimm' season 6 episode 4 spoilers: Eve searches for answers about her visions; Sasha Roiz teases 'shocking' series finale

A psychic Wesen sets his eyes on a young family on the upcoming episode of NBC's supernatural series "Grimm" season 6.

Titled "El Cuegle," this week's episode will see Eve (Bitsie Tulloch) search for answers about her strange visions. According to the official synopsis, Nick (David Giuntoli), Hank (Russell Hornsby), and Wu (Reggie Lee) look into the case of a Wesen who terrorizes a young family. It turns out that he has a surprising motive, and they must stop him before it's too late.

Elsewhere, Capt. Renard (Sasha Roiz) is forced to deal with the arrival of an unexpected guest. Diana (guest star Hannah R. Loyd) brings up some interesting news for Monroe (Silas Weir Mitchell) and Rosalee (Bree Turner), while Eve (Bitsie Tulloch) is determined to seek answers about her bizarre visions. She eventually decides to come back to the catacombs under Nick's loft to learn about the side effects from being healed by the magic stick.

"Grimm" is almost halfway through its season, and despite the dip in ratings, many viewers are still sad to see the series end. Main villain Roiz recently caught up with Yahoo TV, and he shared interesting teasers on the upcoming finale. The actor revealed that some of the fans' favorite aspects of the program will be "very much present" in the bittersweet final episode.

"It gets pretty dark at one point, darker than I would have imagined it going, but like it always is with 'Grimm,' there's this beautiful sunshine that comes out after the rain," he said. "That's very much a signature of our show. It ends in line with what the fans have come to appreciate over six years. There are definitely some shocking moments. It was hard to read that final episode. I got very sentimental reading it," he went on to say.

The sixth season of "Grimm" airs every Friday night at 8 p.m. ET on NBC.