| 1: A Night Patroll |
| May 25, 2018 |
| With the trolls hiding out in Arcadia, AAARRRGGHH!!! goes undercover to see what Gunmar is up to. A potential rival brings out Jim's jealous side. |
| 2: Arcadia's Most Wanted |
| May 25, 2018 |
| Toby gets caught in the crosshairs when a troll goes missing and the city cracks down on crime. An ancient voice refuses to be silenced. |
| 3: Bad Coffee |
| May 25, 2018 |
| Something strange is brewing at school, where the teachers are more agitated than usual. Claire's illness shows disturbing side effects. |
| 4: So I'm Dating a Sorceress |
| May 25, 2018 |
| Toby and Darci ask Jim and Claire on a double date. Gunmar returns from his travels, now armed with the knowledge to bring forth the Eternal Night. |
| 5: The Exorcism of Claire Nunez |
| May 25, 2018 |
| While Gunmar searches for the Staff of Avalon, Jim and Toby head into the Shadow Realm to rescue Claire's spirit and return it to her body. |
| 6: Parental Guidance |
| May 25, 2018 |
| When Barbara's art obsession leads to an "aha!" moment, she demands Jim tell her the truth. Dictatious reveals Gunmar's plans to resurrect Angor Rot. |
| 7: The Oath |
| May 25, 2018 |
| With the future of two worlds at stake, the team races to find Merlin's Tomb -- and the Staff of Avalon -- before Gunmar can get his hands on it. |
| 8: For the Glory of Merlin |
| May 25, 2018 |
| A long-dormant ally shows Jim and his friends what really happened at the Battle of Killahead. Gunmar awakens Morgana, and Angor Rot plots his revenge. |
| 9: In Good Hands |
| May 25, 2018 |
| Señor Uhl interrupts an important mission with an awkward ultimatum for Jim: help two new students fit in ... or face a repeat of sophomore year. |
| 10: A House Divided |
| May 25, 2018 |
| Merlin has a plan to go to war, but it's Jim's choice to make. Blinky and AAARRRGGHH!!! search for allies. Gunmar uses Barbara to get what he wants. |
| 11: Jimhunters |
| May 25, 2018 |
| A greatly changed Jim renews his Trollhunter training but struggles to accept his new reality. Gunmar and Morgana rally the troops for an attack. |
| 12: The Eternal Knight, Part 1 |
| May 25, 2018 |
| The Eternal Night covers Arcadia in shadow, leading to a long-awaited showdown between Gunmar and the newly transformed Trollhunter. |
| 13: The Eternal Knight Part 2 |
| May 25, 2018 |
| An epic battle comes to a head in the darkness as Jim and his friends push back against Morgana. But without Merlin, how will they stop her? |
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