Mudslinging is the fifteenth episode of Trollhunters.
Jim searches for a way to kill Gunmar so Claire can bring her brother back home. A power-hungry Strickler returns to Arcadia with Angor Rot.
Jim is nominated for Spring Fling King, but just when he has to make suggestions during the ceremony, he finds himself stuck in a tiff with a golem, which is terrorizing the soccer field. At the same time, Strickler brings Angor Rot to Arcadia so the Troll assassin can meet his prey while he battles the golem.
- 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!!!
- Ike Amadi as Angor Rot
- Amy Landecker as Barbara Lake
- Andrea Navedo as Mrs. Nuñez
- James Purefoy as Kanjigar
- Cole Sand as Eli Pepperjack
- Yara Shahidi as Darci
- Lauren Tom as Mary Wang
- Matthew Waterson as Draal
- Frank Welker as Fragwa
- Jimmie Wood as NotEnrique
- Thomas F. Wilson as Coach Lawrence
- Steven Yeun as Steve Palchuk
- Strickler returns to Arcadia and becomes the new principal of Arcadia Oaks High (after he used an Antamonstrum to "remove" Principal Levit from his position).
- Continuity Error: When the assembly scene opens, Darci is sitting by Claire as the Mole Mascot is dancing behind Coach Lawrence. Then after the camera change she is no longer in the stands.
- Toby and Jim nearly break the fourth wall when discussing that the latter wears the same outfit everyday.
- A similar incident occurred with Claire in "Adventures in Trollsitting".