Party Monster is the twenty-first episode of Trollhunters.
The Changeling posing as Claire's little brother throws a house party for the trolls of Arcadia. Jim and Toby look for a way to take Strickler's ring.
NotEnrique throws a house party for the Trolls of Arcadia, the same night that Mary and Darci are supposed to come over and Claire does everything in her abilities to keep them from finding out that there are monsters occupying her house. Meanwhile, Jim and Toby's search for a way to remove Strickler’s ring takes a surprising turn when they run into some conundrums with Blinky's books.
- Kelsey Grammer as Blinky
- Anton Yelchin as Jim Lake Jr.
- Charlie Saxton as Toby Domzalski
- Lexi Medrano as Claire Nuñez
- Jonathan Hyde as Mr. Strickler
- Fred Tatasciore as AAARRRGGHH!!!
- Brook Chalmers and Tom Kenny as Rot and Gut
- Grey Griffin as Quagawumps
- Yara Shahidi as Darci
- Lauren Tom as Mary Wang
- Jimmie Wood as NotEnrique
- "Me and My Crew" from the All Hail King Julien soundtrack plays in this episode.
- This is the first (and so far only) episode of Trollhunters where Jim is never seen in his Trollhunter Armor, but still uses his amulet and sword (though in the trio's planning montage).
- Getting Crap Past the Radar: The second instance of the word "crap" is used in this episode. When it's revealed by Toby that Jim needs to retrieve the Kairosect from Gatto's Keep, Jim responds "Gatto!? Oh great, aren't you already on his crap list!?"