Les tracks the survival skills of the moose in the run-up to mating season.
Candice and Max are going to get married and she is making the last wedding arrangements at work, which annoys Antoine. Val and Mehdi, tired of seeing them fighting all the time, suggest them to be treated by Paul Perrier, the police psychologist, or they will request to be transferred, which Candice and Antoine accept. In the meantime, two students report at the police station that a classmate from high school is missing. While searching his home, the team discovers that all the family is missing too and that there are traces of blood.
The main suspect in the investigation is found murdered in the forest, but there is no trace of the Frémonts. Candice and Antoine, still in each other's body, try to find Dr Lermin, who hypnotized them, to give their bodies back, as well as solving the investigation as quickly as possible, before Candice's wedding. Only doing their best to understand each other will help them to put an end to their delicate situation.
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.
When Barbara's art obsession leads to an aha moment, she demands Jim tell her the truth. Dictatious reveals Gunmar's plans to resurrect Angor Rot.
Could giant ancient drawings found etched into the desert floor be part of an ancient alien code?
Dad annoys everyone with his old ventriloquist dummy Lord Luck, while Jonny's recently dumped friend Ben comes for dinner in need of cheering up.
The guests on Graham's sofa are Chris Pratt, Bryce Dallas Howard and Jeff Goldblum, who star together in new sequel Jurassic World: Fallen Kingdom. Plus music from Jake Shears, who performs Creep City.
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.