NBC has released the first twenty minutes of "Grimm" online. It follows detective Nick Burkhardt (David Giuntoli) who has strange visions of some people turning into monsters. He finally finds the answer when his only living relative reveals that he is a descendant of an elite group of hunters known as "Grimms" who must stop the proliferation of supernatural creatures in the world.
At the end of the long preview to the new crime drama series, people can get an extended sneak peek to "Chuck" season 5. In the scene, Chuck, Sarah and Casey find themselves in danger of being killed and rely on Casey. After struggling to reach the spot, Morgan must use his Intersect to fight the bad guys.
The first season of "Grimm" and the final season of "Chuck" will be kicked off on Friday, October 28 as part of NBC's two nights of Halloween-themed programming. The network has previously offered a full preview of "Grimm" premiere episode for those following the show's official Twitter handle.