The menace of Castor rears its head once more

Castor pursues the Leda clones for original tissue samples

A shocking revelation about the Castor-Leda connection has the sisters reeling

Sarah’s fate hangs in the balance as she tries to save her sister

Helena and her seestra are reunited at the Castor camp when Sarah is captured

Felix presses Rachel for information about Sarah’s whereabouts

Alison tries to take her and Donnie’s business to the “next level”

When Rachel makes a promise to Sarah, it comes with a hefty price

Sarah, Felix, and Mrs. S take a trip hoping to track down the Castor Original

Castor and Topside force Sarah to make uneasy alliances