The heroes brace for Angor Rot's inevitable invasion and prepare for the fight of their lives. Jim locates the last Triumbric Stone.

Two fateful battles unfold when Bular and Strickler order Jim to unlock the portal and free Gunmar and his Gumm-Gumm Army from the Darklands.

With Jim still trapped in the Darklands searching for Enrique, his friends rally to bring him back. But the Troll Tribunal has other ideas.

Every second counts when Jim turns to a time-stopping Kairosect to snatch Strickler's ring, save his mother and find the second Triumbric Stone.

A reluctant Jim joins forces with Strickler to keep Barbara alive. Gnome Chompsky returns from the Darklands with important news about Enrique.

The Killahead Bridge is complete, but the door to the Darklands still won't open. Jim is forced to tell Claire the truth when she becomes a target.

With Barbara's life hanging in the balance, Jim races to break the spell that bonds her to Strickler. Angor Rot attacks Toby and Claire.

As Claire grows increasingly suspicious, Jim's mom invites Strickler over for dinner, where the tension is so thick, you could cut it with a knife.

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.

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.

A troll queen arrives from afar to take AAARRRGGHH!!! back to his homeland, revealing his devastating secret. Strickler asks Jim for protection.

Jim preps for a high-stakes rematch against Draal, the amulet's seemingly rightful heir. But their animosity gives way to a surprising partnership.

A horde of pixies descends on Arcadia Oaks High, sending the student body into a tailspin. Angor Rot comes to Jim with a surprising proposal.

A barely recognizable Blinky experiences the highs and lows of being human. Angor Rot marks Jim for a fate that's worse than death.

In a revealing flashback episode, Otto and Dictatious vie for Gunmar's ear while an increasingly paranoid Steve finds an unlikely ally.

Facing serious accusations from the Tribunal, Jim gets the chance to see what his life would be like if he'd never found the amulet.

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.

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.

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.

The Eternal Night covers Arcadia in shadow, leading to a long-awaited showdown between Gunmar and the newly transformed Trollhunter.

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?

Armed with an ancient troll-hunting tool, Jim and Toby set out to unmask the Changelings living among them. Claire makes Jim a tempting offer.

Jim's 16th birthday is full of surprises, including the arrival of a terrifying new species of troll that's immune to the effects of sunlight.

Draal gives Jim a troll-made totem to help curb his anxiety about Claire. But Jim's newfound overconfidence leads him to a startling realization.

Claire gets her first look at Heartstone Trollmarket, and Jim receives a ghostly summons. Elsewhere, Strickler awakens an ancient assassin.