|This article contains canon information corresponding to the Tales of Arcadia franchise. That means all information in this article is true and has appeared/been validated officially on-screen.|
Part One of Trollhunters premiered December 23, 2016.
Jim Lake Jr. along with this best friends, Tobias 'Toby' Domzalski, Claire Nuñez and his troll companions, Blinky, AAARRRGGHH!!!, and Draal must thwart all attempts that happen to harm humans & trolls alike while constantly being attacked by evil forces, and dealing with school life and his oblivious mother. Part One contains 26 episodes, consisting of (technically) two parts.
The first half focuses on Jim becoming The Trollhunter and discovering evil trolls called "Gumm-Gumms", who wish to free the Gumm-Gumm leader, Gunmar from the Darklands, headed by changeling Walter Strickler and Gunmar's son, Troll brute Bular.
The second half deals with Strickler attempting to take leadership of their community and going rogue by unleashing dormant ancient-troll, Angor Rot on Jim. Jim and his friends also band together to rescue Claire's baby brother, Enrique, who was taken by Goblins to the Darklands to create a changeling, nicknamed 'NotEnrique', who ultimately but reluctantly defected to ally with Jim because of the sympathy he feels for Claire.
Other characters introduced include Barbara Lake, Jim's mother, Steve Palchuk, Arcadia Oaks High's resident jock & bully who finds sadistic pleasure in bullying Jim, Toby and most extensively Eli Pepperjack, a glasses-wearing "Nerd" who is actually actively aware that the trolls exist, but no one believes him. Vendel is an elderly troll who is Heartstone Trollmarket's leader, guardian and notable confidant and Gnome Chompsky is a gnome who resides in Toby's House in his toy house, who volunteers to enter the Darklands to rescue Enrique.
|NO.||Episode name||Originally released|
|1||"Becoming: Part 1"||December 23, 2016|
|2||"Becoming: Part 2"|
|3||"Wherefore Art Thou, Trollhunter?"|
|4||"Gnome Your Enemy"|
|6||"Win, Lose, or Draal"|
|7||"To Catch A Changeling"|
|8||"Adventures in Trollsitting"|
|11||"Recipe for Disaster"|
|12||"Claire and Present Danger"|
|13||"The Battle of Two Bridges"|
|14||"Return of the Trollhunter"|
|16||"Roaming Fees May Apply"|
|17||"Blinky's Day Out"|
|18||"The Shattered King"|
|20||"Where is my Mind?"|
|22||"It's About Time"|
|25||"A Night to Remember"|
|26||"Something Rotten This Way Comes"|
- Part One of Trollhunters has the most episodes out of Part Two and Part Three (which contain 13) by 26. Currently, it has the most episodes out of all the Tales of Arcadia installments.
- In an interview, Guillmero Del Toro stated that they wanted to make episodes 14-26 as Part Two since it started a new arc, but executive meddling prevented that.