As a new day dawns in Arcadia, two trolls are locked in an epic battle with major consequences for the human world -- and one human boy in particular.

While Jim gets a crash course in troll history, big problems -- and a bully -- await him in the human world. What better time for his first mission?

The Changeling posing as Claire's little brother throws a house party for the trolls of Arcadia. Jim and Toby look for a way to take Strickler's ring.

Now out of the Darklands and readjusting to life in Arcadia, Jim and the team must face the consequences of their risky actions.

Multiple problems plague a frazzled Jim when his amulet goes on the fritz and Claire invites him to meet her parents at a family barbecue.

Jim and Toby tour Heartstone Trollmarket, where Jim begins his training and the presence of the first human Trollhunter stirs up bitter resentment.

A familiar foe comes to Jim's aid in the Darklands. Back in Arcadia, Toby's distracting new headgear picks up an important clue.

Still reeling from the discovery of the amulet's power, a stunned Jim meets his new mentors and learns he's been tasked with a sacred responsibility.

While Draal settles into his new digs, Jim volunteers to babysit so he can find out whether Claire's little brother, Enrique, is a Changeling.

When an oozy creature shows up in Arcadia, Jim and the gang set out to find it -- while playing parents to two sacks of flour for a school assignment.

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.

Jim tries to get closer to Claire on a school field trip to the museum, only to learn that the museum's curator, Ms. Nomura, has an unsettling secret.

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.

Toby and Claire take on a Trollhunter task so Jim can win a Spring King challenge. In the process, they learn to master new weapons.

Claire recruits NotEnrique for a secret mission, while bully Steve stirs up trouble at school. In the Darklands, Jim meets "The Skullcrusher".

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.

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.

The heroes launch a dangerous quest to find the first Triumbric Stone. Angor Rot concocts a charm that links Strickler and Barbara's fates.

The heroes' search for the second Triumbric Stone takes them deep into unfamiliar marshlands. Claire asks Jim to be her dance partner.

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.

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

Something strange is brewing at school, where the teachers are more agitated than usual. Claire's illness shows disturbing side effects.