A flashback to Beth Childs' final investigation, days before her suicide.

Kendall may be the key to stop Castor; the sisters appear to be thwarting their most dangerous foe.

Clone Club heads to London to track down the Castor Original, but their enemies follow closely.

Ruthless in Purpose, and Insidious in Method Rachel bargains for her freedom with decoding Duncan's Moreau book.

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. However, they are ...

Paul learns the truth about Coady's plans for Castor and has no choice but to make a dangerous play.

Sarah and Helena suffer a strained reunion; the Leda family worries about Sarah's absence.

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

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 Sarah reunite to track ...

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 to play, toying ...

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 sisters' lives. ...

After the successful abduction of Kira, Sarah prepares to surrender to Rachel and the Dyad Group; but the Clone Club has other ideas as they band together to pull off the ultimate rescue.

Cosima takes a turn for the worse, forcing Sarah to take desperate action - with tragic consequences for those she loves. The Proletheans set their ultimate plan in motion. Alison and Donnie tangle with the law.

A new player in the clone conspiracy turns up at Felix's door, sending him into crisis mode. With Cosima running out of options, Sarah struggles with the decision to surrender a crucial piece of leverage and make a deal with DYAD.

When a rehab confidante betrays Alison and threatens to expose the truth about Aynsley's death, she goes into free fall on the eve of Family Day. With Donnie and the kids set to visit, it's all clones on deck to contain the fallout.

Sarah and Helena are traveling together to Cold River to find out more about their clone past and specifically the person who Helena refers to as the Swan Man. This trip marks the first ...

Rachel returns home to find Rosen dead, which she takes out on Sarah and Cosima. She also makes Paul an offer he can't refuse, even if he wanted to. In this new position, Paul decides to ...

Sarah survives the car crash, is quickly reunited with Kira and sets off with Cal in his camper. She decides to head back to the city to find out from Mrs. S just what is going on. She also...

Sarah is able to escape with Kira from the bird watchers and Mrs. S, and now, along with Felix, are on the run with no money. They decide to take refuge at a secluded house where the owner ...

On information from Art, Sarah learns that it is not Rachel who abducted Kira, but rather the Prolethians, the reasons she does not know behind the abduction. However, there is no news ...

Rachel has kidnapped Kira and Mrs. S. While trying to elude Rachel's thugs herself, Sarah has to decide whether to trust Paul as the person who has the best access to Rachel of those she ...

Dr. Leekie offers deals to both Alison and Cosima. Sarah meets Rachel Duncan. Delphine tries to make amends. Alison tries to get her life back together. Helena escapes.

After Kira's life is threatened, Sarah is on the warpath, but Dr. Leekie makes her think twice about her plans for revenge. Meanwhile, Cosima faces the truth about Delphine, forcing her to choose sides. Now, it's up to Sarah to decide the killer's fate, b

Art and Angela investigate Sarah's life. Alison has an affair with her best friend's husband. Paul ties up a loose end. Helena finds Sarah's weak spot.

With Paul missing, Sarah is forced to confront the conspiracy head on. But when Paul learns Sarah has kept essential information from him, the fragile trust between them threatens to shatter. Meanwhile, Cosima grows closer to Delphine and the dangerously

Sarah's hunt for answers is interrupted by a trip to the suburbs. Alison's paranoia has boiled over, putting all the Orphans at risk. But when Sarah, Alison and Beth's worlds dangerously collide, Sarah must decide who to trust with her secret.

Both Sarah and Alison believe that their lovers are actually monitoring them. Vic finds out that Sarah's alive.

While Sarah tries to track down her mysterious blonde clone, Alison fills in for Sarah on a visit to see her daughter.

Sarah has reinstated Beth into the detective force just as law enforcement finds Katja Obinger's body.

Sarah looks deeper into the secret life that Beth seems to have lead. Art refuses to return Beth's money until Sarah goes through with the hearing.

Sarah Manning witnesses the death of a woman who looks exactly like her. She decides to escape her dramatic life and take the woman's identity for her own. But converting to a new life is harder than she expected.