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 5-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.
Sid the Pirate and Arrby steal the ferris wheel. When the pups set out to bring it back to Adventure Bay, Sid comes up with a sneaky plan to steal the Sea Patroller.
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.
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 supervillain 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.
YouTube sensation Bethany Mota channels a punk rocker when she goes undercover to link up with and mentor potential YouTube stars. While pretending she wants to start her own YouTube channel, Mota hopes things will click when tasked with teaching a dance class for a YouTube channel; picks up the beat in a beatboxing challenge on Hollywood Boulevard; and fears she won't be able to keep it together when faced with eating a cricket during a YouTube food challenge.
Neil lets slip about an old crush and Fiona is not impressed. Penny and Robert contemplate selling up, and Neil's mum comes clean about her on-site relationship.
Wyatt Cenac talks about America's student loan crisis, tries to streamline sidewalk traffic, and examines the unsettling intersection of police and sexual misconduct.
Mystake heals Lloyd's injuries but his survival comes with a heavy price. Garmadon conjures up a destructive giant to display his powers.