Gus and his cohorts set out for Alaska to reconnect with Birdie, who's working on a cure for the Sick. But first, they test their luck at an old casino.
As polar night looms, Gus and his crew arrive at the outpost — but they're not alone. To find Birdie and the cave, they must brave several obstacles.
After suffering an unimaginable loss, Gus must make a choice that will determine the fate of humans and hybrids. Who will be left to tell their story?
After a doctor joins Gus and his crew, they seek a way to the coast and stumble upon a plane owned by a family in desperate need of medical attention.
As Gus learns more about a threat and their dangerous plans, the group races to catch a departing boat. Jepperd and Becky face an impossible decision.
An unsettling discovery at sea forces Gus to take on a grim chore as tensions swell between his companions. On land, an enemy interrogates Becky.
After discovering that Kelly's church is using her former home for their disturbing "Hell House", Imogen springs into action, while Mouse and Ash plan a Pride pool party in protest. Later, the PLLs' plan to freak out the faithful takes a frightening turn.
After a daring rescue, Gus meets an individual well-versed in hybrid history. Amid emotional reunions and eerie revelations, all roads lead to the cave.
The BAU investigates a series of killings with the same brutal M.O. they saw with the strike team deaths. The team tries to link the victims to determine if they are dealing with the same killer. Rebecca joins Lewis and Tyler Green on a stakeout.
Emma seeks solace in a new friend while Phoebe replaces her sister in the family home. As Emma digs deeper into the past, a forgotten childhood memory shines a light on her relationship with Phoebe, causing her to doubt her sister's intentions.
Prentiss uncovers a series of brutal killings linked by a specific calling card. Despite being haunted by Elias Voit, the BAU is forced to team up with him to track the Gold Star killer. Rossi and Prentiss devise a plan to gain leverage over Voit.
It's Kim's birthday week but before she can celebrate, she is summoned to Jury Duty. Kris and Kendall hang out with new bestie, The Golden Bachelor, who comforts Kris as she worries about a new ailment. Khloé gets real about her romantic life and Tristan.
Gordon’s house is overrun by chaotic visitors, including Gordon’s brother Heavy, who makes things awkward with Ash when he indelicately sheds some light on Gordon’s past.
Gordon and Ashley have to come to terms with Yvette’s latest play for Gordon’s affections.
Despite her impressive editing skills and everyone describing her as cute, first-year Gaeul isn't immune to being bullied. Will Hobin and Snapper leap to her aid?
Miwa continues to worry about Ryu and how he's coping with the death of one of his previous customers. Hayase receives another promotion that will put him in America for a few years, but when Rumi comes back to town, he hesitates to leave.
As the police investigate the crime and Rani's involvement, the other outlaws don't know who they can trust.