<P> Merlin is awakened, and Morgana is released from her prison by the Staff of Avalon . Barbara recovers her memories of knowing about Trolls, forcing Jim and his friends to reveal the truth to their families . Angor Rot is resurrected by Morgana . To better fight against Gunmar and Morgana, Jim is irreversibly transformed into a half - troll . Morgana brings forth the Eternal Night so that she and Gunmar can freely invade the world . Jim and his allies fight and win the battle, Jim killing Gunmar and Claire trapping Morgana in the Shadow Realm with help from Angor Rot, who sacrifices himself to help defeat the witch . Merlin leads the Trolls of Arcadia to a new home in New Jersey . Jim and Claire say goodbye to their families and friends (including Toby) as they leave with the Trolls . </P> <Ul> <Li> Anton Yelchin and Emile Hirsch as James "Jim" Lake Jr . / Trollhunter, the first human Trollhunter and a reluctant hero dealing with the pressures of leading a double life . He has a talent for cooking and eventually sword - fighting, and cares deeply for his mother and friends . Yelchin provided the voice for Jim from Part 1, through portions of Part 3 before he passed away . Hirsch assumed the role following Yelchin's passing . </Li> <Li> Charlie Saxton as Tobias "Toby" Domzalski, Jim's best friend and confidant . Dorky and excitable, he fully embraces the secret world of trolls and aids Jim in his quests . His weapon of choice is a warhammer . </Li> <Li> Jonathan Hyde as Walter Strickler, Jim's history teacher who is actually a Changeling . When Jim discovers the truth, he loses all respect for him and the two become bitter enemies . However, he remains affable toward Jim and has redeeming qualities . </Li> <Li> Kelsey Grammer as Blinkous "Blinky" Galadrigal, Jim's six - eyed troll mentor . A wise and scholarly troll with a heart of gold, he serves as the brains of the Trollhunters and eventually becomes a sort of father figure to Jim . </Li> <Li> Fred Tatasciore as Aarghaumont "AAARRRGGHH!!!", a burly troll and close companion of Blinky who forms a deep bond with Toby . He was kidnapped by the Gumm - Gumms as a child, which stunted his vocabulary . Tormented by the atrocities they committed, he deserted Gunmar to live a life of peace . However, he will still fight to protect those he cares about . </Li> <Li> Lexi Medrano as Claire Nuñez, Jim's girlfriend . She is a feisty, kind, jolly, sarcastic, curious, and intelligent tomboy who enjoys books and is a talented martial artist and gymnast . She obtains the Shadowstaff, a staff capable of creating portals activated by the user's emotions . </Li> <Li> Victor Raider - Wexler as Vendel, the leader of Trollmarket . An ancient and wizened troll, Vendel is at first suspicious of Jim and often comes across as a pessimist, but shows a softer side and eventual faith in Jim . At the end of Part 2, he is killed by Usurna after she revealed herself to be working for Gunmar, but not before recording the act to warn the Trollhunters . </Li> <Li> Ron Perlman as Bular, the son of Gunmar . A brutish and powerful troll warrior, he's obsessed with freeing his father from the Darklands . He holds a special disdain for Changelings, whom he considers "impure", putting him at odds with Strickler and other Changelings who seek to free Gunmar . He is killed by Jim in the first half of season 1, but later makes appearances in the season 1 episode "Where Is My Mind" and the season 2 episode "Unbecoming". </Li> <Li> Amy Landecker as Barbara Lake, Jim's protective and overworked mother . Her husband left the family when Jim was five years old . Her doctor job means she's often away from home, which lets Jim pursue his Trollhunter duties . </Li> </Ul> <Li> Anton Yelchin and Emile Hirsch as James "Jim" Lake Jr . / Trollhunter, the first human Trollhunter and a reluctant hero dealing with the pressures of leading a double life . He has a talent for cooking and eventually sword - fighting, and cares deeply for his mother and friends . Yelchin provided the voice for Jim from Part 1, through portions of Part 3 before he passed away . Hirsch assumed the role following Yelchin's passing . </Li> <Li> Charlie Saxton as Tobias "Toby" Domzalski, Jim's best friend and confidant . Dorky and excitable, he fully embraces the secret world of trolls and aids Jim in his quests . His weapon of choice is a warhammer . </Li>

When is troll hunters part 4 coming out