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.

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

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.

Castor pursues the clones in order to obtain original tissue samples; Helena is examined by a new villain.

Leda and Castor hunt for the original clone DNA; Mark and Gracie pursue new leads; Art and Sarah reunite.

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