Unfortunately, "Grimm" fans will have to wait a whole month before the series airs another new episode since NBC will dedicate its primetime spots to airing the 2014 Winter Olympics. However, once the Olympics are over, the thrilling drama series will return with an all-new episode filled with twists and horror.

In the last episode, Monroe endured one hell of a family reunion after he proposed to Rosalee and his parents, played by guest stars Dee Wallace and Chris Mulkey, decided to surprise him and Rosalee with an early arrival to Portland to celebrate the big news. However, while there, things get intense when Monroe's father attacked Nick.

On Feb. 28, NBC will air "Revelation" in which an old friend will come to town. NBC has yet to issue an official aynopsis for the episode, but DreadCentral reports that it is written by David Greenwalt and Jim Kouf and directed by Terrence O'Hara.

Later on in the season, "Hostages" actress Mary Elizabeth Mastrantonio will mark her return to the series as "Grimm's" Woman in Black, TVLine reports exclusively.

In the spring the actress will reprise her role of Kelly Burkhardt, Nick's mother who has been dubbed the Woman in Black. Although the "Grimm" matriarch has been missing since Season 2, Juliette discovered earlier this season that she has been keeping in touch with Nick via email. There is also speculation that Kelly's return will be connected to another character who is not Nick. She will appear in multiple episodes.

"Revelation" airs on "Grimm" on Friday, Feb. 28 at NBC.

Watch a preview of the episode below.