Kyra Harper

Trick takes a great risk when he decides to foresee the future on his own, while a furious Bo confronts the Ash about a betrayal, but is stunned by his response.

Sarah tries to bluff a ruthless enforcer that all is well at the Dyad Institute, while Alison's family finances pose problems. Helena is prisoner of the Castor clones, one of whom poses an immediate threat to those Sarah holds dear.

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

Some desperate schemes turn upon the use of unwitting clone Crystal, a manicurist tired of being manipulated, and Cosima's lab assistant, Scott.

Sarah, Mrs S and Felix return to London seeking the 'Castor original' man with deadly intent, while back home with the Hendrixes, Helena also has a violent answer to a family threat.

Cosima gets inside the head of one Castor clone while Sarah tracks another, Mark, who seeks information stashed by Gracie's late father.