Kyra Harper

Chance travels to a remote Alaskan island to find a missing doctor and expose an industrial giant's involvement in the death of a mining foreman. Guest star MOON BLOODGOOD (Terminator Salvation, Day Break, Journeyman) appears as Dr. Jessica Shaw.

As Bo seeks to punish the Ash (Vincent Walsh) for claiming credit for bringing Nadia out of her coma, and Trick (Rick Howland) goes under the spell of a power hallucinogen to divine the future, they set the Fae on a path towards an epic war.

Rachel bargains for her freedom with decoding Duncan's Moreau book; Sarah must pursue the Original Castor.

Sarah pursues Helena, who is being held in a compound far away; Sarah must deter a Topside investigator.

Helena works in a faraway military compound; Sarah's fate hangs in the balance as she tries to save her sister.

Paul learns the truth about Coady's plans for Castor and has no choice but to make a dangerous play; Alison and Donnie hatch a plot of their own regarding Bubbles.