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
Seor Uhl interrupts an important mission with an awkward ultimatum for Jim: help two new students fit in ... or face a repeat of sophomore year.
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.
Douglas discovers that a nearby island is inhabited and wants to visit, but Brett, desperate to stop him leaving, puts him on trial for 'assaulting' Susan. Meanwhile, Arnab attempts to convince Susan that having sex with him will make Douglas jealous.
Winter winds force the captains to reevaluate risk and reward. Shawn's mega-barge extraction takes a turn for the worse. Ken pushes the Myrtle to the limit on a -day run. Emily sends her divers deeper. Kris invents a new form of prospecting.
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.
A greatly changed Jim renews his Trollhunter training but struggles to accept his new reality. Gunmar and Morgana rally the troops for an attack.
Something strange is brewing at school, where the teachers are more agitated than usual. Claire's illness shows disturbing side effects.
The Z-Force gives Max and Phoebe a superhero day off, but when they relive the day over and over again, they must find a way to break the loop.
When Scrooge unexpectedly disappears during his birthday party, Huey, Dewey and Louie find themselves hosting a mystery party where everyone is a suspect.
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.
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.
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.
Led by a boy named Ryder, a team of six playful rescue dogs use their individual talents to protect the seaside town of Adventure Bay. The pups are occasionally joined by newer helpers: Cap'n Turbot, Robo-Dog, Everest, and Tracker.
Phoebe and Max are determined to make their 100th save their best and most memorable one yet, but by ignoring a series of small saves they overlook a super villain plotting revenge on Hank and Barb.
Max finally declares his independence from his parents' house rules and moves to his friend's house, where they only rule is that there are no rules; ultimate freedom quickly becomes more than Max can handle.