The worst episodes of Orphan Black
Ranked by viewer rating, lows first. Lit marks on the season rail place this list across the run. Vote on a placement to back it or contest it.
- 01
Transitory Sacrifices of Crisis
Castor pursues the Leda clones for original tissue samples. Meanwhile, Helena, who is pregnant and imprisoned, is examined by a mysterious villain.
- 02
The Weight of This Combination
Season 3 begins with Sarah pursuing the missing Helena who is being held in a faraway compound. Sarah uses her wiles and acting chops to deter a Topside investigator who threatens the Leda sisters' lives.
- 03
Formalized, Complex, and Costly
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 them down. Meanwhile, Cosima and Scott try to learn more about Castor's biology and Alison's new money-making venture is going gangbusters. A shocking revelation about the Castor-Leda connection leaves the sisters reeling, just before Sarah witnesses a deadly Prolethean-Castor face-off.
- 04
Scarred by Many Past Frustrations
Helena and her seestra are reunited at the Castor camp when Sarah is captured. As Sarah suffers testing, Paul appears to chide her; but his allegiances are beginning to strain. While the Leda family worries about Sarah's absence, Gracie ‘breaks Amish' under the care of Mrs. S and an unwilling Felix. Cosima falls hard for an internet date, Shay.
- 05
Mingling Its Own Nature with It
Sarah turns to an old flame from her past as she hits the road with Felix, but their brief respite is brutally shattered. Sarah then realises that no matter how far she runs it will never be far enough.
- 06
Variable and Full of Perturbation
A new player in the clone conspiracy emerges and turns up at Felix's door, which sends him into crisis mode. Meanwhile, Sarah struggles with whether to surrender a crucial piece of leverage and strike a deal with Dyad.
- 07
Community of Dreadful Fear and Hate
Alison must secure a store front in order to take her and Donnie's business to the "next level." But things don't go according to plan when her mother, Connie, proves to be a major hindrance. Cosima is facing familiar health issues and calls upon beleaguered Alison for a favor. But with Alison working to save an imperiled Donnie from the merciless hands of a drug lord, it's Cosima who ends up doing a favor. An unassuming Scott gets closer to the greatest discovery of all, when he sits down with beleaguered clone Rachel.
- 08
Governed by Sound Reason and True Religion
Sarah gets Art to help her find Kira and is shocked when she learns where the trail leads. Meanwhile, Alison struggles with Aynsley's death; and Cosima grapples with the worsening symptoms of her mysterious sickness.
- 09
Things Which Have Never Yet Been Done
Cosima takes a turn for the worse, which forces Sarah to take desperate measures that result in tragic consequences for those she loves. Meanwhile, the Proletheans set their ultimate plan in motion; and Alison and Donnie tangle with the law.
- 10
Mark is taken down in a Prolethean shoot-out and Sarah must step in to help. But as Sarah gathers intel that puts her on the trail of the original Castor DNA, a familiar foe is not far behind. While Helena continues to toil in a faraway military compound, it is ultimately Sarah's fate that will hang in the balance as she tries to save her sister. Meanwhile, Gracie is cast out from the Prolethean fold, and Alison and Donnie come face-to-face with unhappy drug lord, Jason Kellerman.
- 11
Nature Under Constraint and Vexed
Series 2 begins with Sarah searching for her missing daughter and suspecting that ruthless pro-clone Rachel is behind the disappearance. Meanwhile, Alison attends the funeral of her fallen friend, Aynsley, which causes Alison to sink into despair.
- 12
Rachel goes on the warpath and lashes out at Sarah's loved ones. While Sarah tries to keep them safe, an unexpected visitor threatens to derail her plans.
- 13
Knowledge of Causes, and Secret Motion of Things
A rehab confidante betrays Alison and threatens to expose the truth about Aynsley's death, which causes Alison to go into a free fall on the eve of Family Day. The clones gather to contain the fallout.
- 14
Sarah comes home to search for answers and with Cosima's help she digs into the origins of the clone experiment. The hunt takes her into perilous territory that could cost her more than she realizes.
- 15
To Hound Nature in Her Wanderings
Sarah joins forces with an unlikely ally, when she follows a trail of clues that she hopes will lead her to the origins of the clone experiment. Meanwhile, Cosima and Delphine make a discovery that could prove to be the key to treating Cosima's illness.
- 16
Certain Agony of the Battlefield
Paul is pushed into action when he discovers the ugly truth behind the Castor Boys' logbooks of names. Meanwhile, Felix becomes desperate for information on Sarah's whereabouts and presses the still-ailing Rachel for any shred of a lead.
- 17
Ruthless in Purpose, and Insidious in Method
When Rachel makes a promise to Sarah, it comes with a hefty price. Meanwhile, Helena and Gracie work with the Hendrixes, and Donnie takes Kellerman to task. Over at Castor, Coady and Benchman scheme to track down the Castor Original, and Rudy descends on DYAD for a much needed asset.
- 18
Kendall may be the key to stop Castor; the sisters appear to be thwarting their most dangerous foe.
- 19
By Means Which Have Never Yet Been Tried
The war with Dyad is all but lost when Rachel's latest ploy forces a broken Sarah to concede. The Clone Club springs into action, uniting in a reckless gambit to save Sarah. As they fight to gain their freedom, Sarah encounters a new ally and uncovers a terrifying new dimension to the conspiracy.
- 20
While Sarah takes the day off to reconnect with Kira, Cosima steps up and infiltrates an exclusive Neolutionist fertility research center. A shocking discovery of their clandestine experiments leads her into a dangerous encounter.
- 21
Clone Club heads to London to track down the Castor Original, but their enemies follow closely.
- 22
Sarah regresses to old habits while struggling to cope with a loss. Following in Beth's footsteps, Sarah questions her strength to carry on.
- 23
Sarah, an orphan, gets caught up in a deadly conspiracy after learning that she is a clone. In the opener, Sarah witnesses the suicide of a woman who looks just like her and assumes the victim's identity in hopes of escaping her troubled life.
- 24
Sarah continues to impersonate Beth and gets her a second chance on the force.
- 25
Sarah's fake detective ruse stretches thin when the police find the body that she buried.
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