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.
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.
Claire gets her first look at Heartstone Trollmarket, and Jim receives a ghostly summons. Elsewhere, Strickler awakens an ancient assassin.
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.
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.
The heroes launch a dangerous quest to find the first Triumbric Stone. Angor Rot concocts a charm that links Strickler and Barbara's fates.
On Graham's sofa are Will Smith, Helen Mirren and Naomie Harris, appearing together in ensemble drama Collateral Beauty, and Sherlock actor Martin Freeman, talking about the new series of Sherlock. There is also music from Katie Melua, who performs The Little Swallow.
A barely recognizable Blinky experiences the highs and lows of being human. Angor Rot marks Jim for a fate that's worse than death.
After their huge argument at Toya's Prom Party, Mariah and Quad's friendship is on shaky ground. Quad is planning a birthday bash for Dr. G and doesn't want Mariah to bring her drama to the party, so she takes “extra” precautions. Toya faces the hard truth she can no longer afford the lifestyle she wants but when it's time to make changes she gets cold feet. Lisa's antics put Heavenly's patience to the test as they plan for their upcoming conference.
The heroes' search for the second Triumbric Stone takes them deep into unfamiliar marshlands. Claire asks Jim to be her dance partner.
Mr Khan faces up to the fact that his life hasn't turned out the way he planned it.
A troll queen arrives from afar to take AAARRRGGHH!!! back to his homeland, revealing his devastating secret. Strickler asks Jim for protection.
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.
Actor and former NFL star, Terry Crews, surprises families at Christmas time by providing them with some last-minute help during the holidays.
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.
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.
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.