'Community' will take us on another one of its ambitious concept episodes next Thursday with the Comic-Con-themed "Conventions of Space and Time," but tomorrow's all-new episode "Paranormal Parentage" will celebrate Halloween a bit unintentionally late as the gang visits Pierce's mansion for the first time, getting lost on the way to a Halloween party! And what mysteries should the Greendale gang find hidden in Pierce's mansion, pray-tell? Check out the latest clip from tomorrow's "Paranormal Parentage" for a clue!

NBC might be in dire straights these days, but that won't stop the Greendale gang of 'Community' from making the best of a trip to Pierce Hawthorne (Chevy Chase's) cavernous mansion in Thursday's all-new episode "Paranormal Parentage." Accordingly, NBC has released a brand-new clip from the outing, which features Shirley (Yvette Nicole Brown) and Troy (Donald Glover) happening upon Pierce's "special gym," the significance of which is largely lost on Troy. No, collars are not for "secret dogs."

Elsewhere, as the season goes on we'll see guest turns from ‘Seinfeld’ star Jason Alexander in a mysterious role,  Brie Larson, ‘Battlestar Galactica’ vet Tricia Helfer, ‘Bridesmaids’ star Matt Lucas, Malcolm McDowell as the gang’s new history professor, and Hollywood icon James Brolin as Jeff (Joel McHale)’s father.

Check out the latest preview from tomorrow's all-new 'Community' "Valloween" episode below, and give us your predictions for the fourth season in the comments!