• (L-R) Bree Turner, Silas Weir Mitchell, David Giuntoli, Bitsie Tulloch, and Russell Hornsby attend the 'Grimm' panel during Comic-Con International 2016 held on July 23, 2016 in San Diego, California.

(L-R) Bree Turner, Silas Weir Mitchell, David Giuntoli, Bitsie Tulloch, and Russell Hornsby attend the 'Grimm' panel during Comic-Con International 2016 held on July 23, 2016 in San Diego, California. (Photo : Getty Images/Matt Winkelmeyer)

Avid "Grimm" viewers can look forward to seeing Nick (David Giuntoli) and beloved characters doing what they do best in upcoming episodes, which is solving cases and defeating villainous creatures. In the upcoming fourth episode of the NBC series' final season, Nick and his friends will be faced with a Wesen beast who has a penchant for snatching babies.

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The first three episodes of "Grimm" Season 6 were thrilling to watch given the story arc that painted Nick as a fugitive and his long-time adversary Renard (Sasha Roiz) as an influential man. However, Nick and his friends managed to turn things around by using a spell that allowed the NBC series' protagonist to clear his name while stopping Renard's rise to power.

In the upcoming "Grimm" Season 6 episode 4, Nick returns to working at the police precinct with Hank (Russell Hornsby) and Wu (Reggie Lee). Going back to his usual police procedural work, Nick's first case will have him dealing with a terrifying Wesen, according to episode spoilers posted on Spoilers Guide.

Titled "El Cuegle," the said episode's titular beast is a three-eyed, three-armed monster who terrorizes families to steal babies. With Rosalee (Bree Turner) pregnant, Nick and his friends will try their best to capture the said Wesen to ensure the safety of all babies, including Monroe (Silas Weir Mitchell) and Rosalee's unborn child.

Meanwhile, the said couple will also receive some surprising news from Diana (Hannah R. Loyd). Given the young girl's impressive powers, Diana might have "seen" something about Rosalee's pregnancy and her yet-to-be-born baby.

In other news, the threat of the Black Claw group and Renard might have diminished, however, Nick and his friends will soon face an even bigger opponent in upcoming episodes. In an interview with TVLine, the NBC series' co-creator James Kouf mentioned that the new enemy will the "worst thing" that beloved characters have ever encountered.

Kouf added, "It is something that they have never seen before. It's more powerful than any Wesen or combination of Wesen we've ever seen on the show."

"Grimm" Season 6 episode 4 will be released on Jan. 27, Friday, on NBC. Watch the episode's teaser clip below: