Sarah pursues the missing Helena who is held in a faraway compound. Sarah must use her wiles - and acting chops - to deter a Topside investigator who threatens the Leda s ...

Castor pursues the Leda clones for original tissue samples. Helena, who is pregnant and imprisoned, is examined by a mysterious new villain. The Castor boys are also out ...

Leda and Castor are both on the hunt for original clone DNA. On-the-lam, Mark and Gracie pursue new leads to find the samples that might set them free, while Art and Sara ...

Bonnie has shot Mark and has left him for dead. Sarah is able to find and help him, doing so because she knows that the Castor clones are the Leda clones siblings, and th ...

Mark has captured Sarah and taken her to the Castor compound, where she is housed in a cell adjacent to Helena's. However, it's not quite the reunion that Sarah was hopin ...

Sarah is all alone at the Castor compound now that Helena has managed to escape, although Rudy is tasked with locating her, she who they believe cannot get far being in t ...

Sarah and Helena have managed to escape from the Castor compound, and arranging with Mrs. S are awaiting Benjamin's arrival in the Mexican desert to retrieve them. Howeve ...

The clone club have made the decision that Helena and Gracie should now be the responsibility of the Hendrixes, which does not sit well with Donnie. Both Alison and Donni ...

Based on what Rachel had deciphered of Duncan's code, Sarah, Felix and Mrs. S believe the answer to finding the Castor original is in London, where they head to Mrs. S' o ...

With Art's help, Sarah, Mrs. S and Felix are able to hide the Castor and Leda original, Mrs. S' own mother Kendall Malone, although she is somewhat of a hostile participa ...