List of Orphan Black episodes

Orphan Black is a Canadian science fiction television series that premiered on March 30, 2013 on Space. The series was created by Graeme Manson and John Fawcett, starring Tatiana Maslany as several clones. The rest of the starring cast includes Dylan Bruce, Jordan Gavaris, Kevin Hanchard, Michael Mando, Maria Doyle Kennedy, Évelyne Brochu, Ari Millen, and Kristian Bruun.

On May 7, 2015, the series was renewed for a fourth season, which premiered on April 14, 2016.^[1] As of May 5, 2016, 34 episodes of Orphan Black have aired.

Series overview

Season		Episodes	Originally aired
			First aired	Last aired
	1	10	March 30, 2013	June 1, 2013
	2	10	April 19, 2014	June 21, 2014
	3	10	April 18, 2015	June 20, 2015
	4	10[1]	April 14, 2016	June 16, 2016[2]

Episodes

Season 1 (2013)

All titles of the first season are quotes from On the Origin of Species by Charles Darwin.^[3]

No. overall	No. in season	Title	Directed by	Written by	Original air date	U.S. viewers (millions)
1	1	"Natural Selection"	John Fawcett	Graeme Manson	March 30, 2013	0.684[4]
British punk con artist Sarah Manning (Tatiana Maslany) sees an identical woman, Beth Childs, commit suicide by jumping in front of a train. Sarah retrieves Beth's bag, and finding that she is well-off, decides to take her place, and clean out Beth's bank account so she (Sarah) can collect her daughter Kira (Skyler Wexler) from her (Sarah's) foster mother, Siobhan Sadler, whom Sarah calls Mrs. S (Maria Doyle Kennedy). Sarah asks her foster brother Felix Dawkins (Jordan Gavaris) to identify Beth's body as Sarah's to buy time for her scheme, and throw her drug-dealer boyfriend Victor Schmidt (Michael Mando) off her trail. Sarah withdraws $75,000 from Beth's account, but discovers to her dismay that Beth is a police detective suspended for shooting Maggie Chen. Beth's partner Arthur Bell (Kevin Hanchard, 'Art') follows 'Beth', and breaks into her car. Sarah is approached by Katja Obinger, another lookalike from Germany. Katja is killed by a sniper, but Sarah manages to escape.
2	2	"Instinct"	John Fawcett	Graeme Manson	April 6, 2013	0.409[5]
Sarah is contacted by a woman who instructs her to dispose of Katja's body, and retrieve her briefcase. Art tells Sarah that he has the $75,000, and won't return it until she testifies at the inquest into Maggie Chen's shooting, and clears her name. It seems that Art placed a cellphone in the hand of the dead Maggie Chen to make it look like Beth had shot Maggie in self-defence, and he doesn't want this to get out. Sarah poses as Katja to get her briefcase from the hotel. Inside the briefcase, she finds evidence of more lookalikes, one of whom is Alison Hendrix, a soccer mom. Sarah gets Alison to set up a meeting where she meets yet another lookalike, evolutionary developmental biology student Cosima Niehaus, the woman she spoke with on the phone.
3	3	"Variation Under Nature"	David Frazee	Graeme Manson	April 13, 2013	0.350[5]
Alison tells Sarah that they are clones. In the briefcase, Sarah and Felix find that three of the clones Katja had found were already dead. Sarah goes to the police station to ask Art for the money back, only to be reinstated as a police detective, and drafted to cover Katja's murder. Worried that her fingerprints might be identical to Katja's she deletes them from the record. Art and Sarah track down the killer who starts shooting at them. Sarah saves Art's life, and then gives chase, only to find that the killer is another clone, Helena, a Ukrainian. Sarah stabs Helena, but Helena escapes. Art returns the money to Sarah, who gives it back to Alison, who had provided it to Beth to help with her investigation into their situation.
4	4	"Effects of External Conditions"	Grant Harvey	Karen Walton	April 20, 2013	0.361[5]
Sarah and Art continue looking for the killer, while Sarah tries to cover up that both killer and victim are her sister clones. The police believe that the killer is a fundamentalist Christian, while Cosima deduces that the group affiliated with Helena believe the clones are abominations and must be killed. Helena keeps a close eye on Sarah and the case, putting Sarah's cover in jeopardy. Mrs. S allows her to visit Kira, but because Sarah is busy working the case, Felix asks Alison to impersonate Sarah otherwise Mrs. S would never allow her to see Kira again. However, Alison is shocked to find that Kira knows she is not Sarah. Helena lures Sarah to Maggie Chen's apartment, where it is revealed that Maggie worked for the same group Helena works for; Beth actually killed Maggie to protect the clones. Sarah allows Helena to escape before Art arrives, and Sarah quits the police force. Helena collapses and gets picked up by a man wearing the same symbol as Helena and Maggie.
5	5	"Conditions of Existence"	TJ Scott	Alex Levine	April 27, 2013	0.327[5]
After waking up from a supposed dream where she was experimented on, Sarah spits out an electrode from her mouth. The clones soon learn that they have monitors, people in their lives whose purpose it is to observe them. Sarah suspects Beth's boyfriend Paul Dierden (Dylan Bruce) of being her monitor, while Alison suspects her husband Donnie (Kristian Bruun). Meanwhile, Vic comes across a chance meeting with Alison, and discovers that Sarah faked her death. In response, Sarah pays Vic $20,000 to leave her alone, 15,000 to pay for his debts incurred by her theft and 5,000 to pay for his 'pain and suffering' regarding the loss of his finger due to the loss of his finger over the unpaid debts. Sarah and Felix spy on Paul's work place, but unknown to them, Paul follows Sarah walking Kira home from school. Paul also discovers that "Beth's" scar is gone. After calling Sarah to meet him at their home, Paul holds Sarah at gunpoint and demands an explanation, prompting Sarah to tell him that Beth is dead. When Sarah asks Paul why he is monitoring her, Paul admits that he does not know.
6	6	"Variations Under Domestication"	John Fawcett	Will Pascoe	May 4, 2013	0.340[6]
Alison purchases a nanny cam and finds that Donnie snuck out during the middle of the night. Paranoid, Alison ties him up, while also handling a house party featuring her neighborhood. Sarah impersonates Alison to question Donnie, who says he was covering up letters from a girl he dated when he and Alison were broken up. Paul follows Sarah and ultimately learns of their nature as clones. He also helps Sarah get rid of Vic when he continues to be a nuisance to her. Felix suspects Alison's neighbor, Aynsley Norris (Natalie Lisinska), of being the actual monitor. Meanwhile, Cosima is approached by Delphine Cormier (Evelyne Brochu), a fellow student. Cosima suspects Delphine of being her monitor, but goes with her to a lecture given by Dr. Aldous Leekie (Matt Frewer) of the Dyad Institute, a proponent of "neolution" (using technology to advance human evolution). Later, it is revealed that Delphine and Leekie are lovers.
7	7	"Parts Developed in an Unusual Manner"	Brett Sullivan	Tony Elliott	May 11, 2013	0.280[5]
Paul is questioned by his handler, Olivier Duval (David Richmond-Peck) regarding Beth's behavior. Though Paul tries to cover up the fact that Sarah is posing as Beth, the neolutionists discover the truth after checking the test results from experimenting on her. The neolutionists also believe Sarah to be the killer of the other clones. Meanwhile, Helena is nursed back to health by her trainer Tomas (Daniel Kash), who orders her to kill Sarah. Although she appears reluctant to do so, she implores Sarah to reveal the names of other clones. Later, Sarah calls Helena to help free Paul who is imprisoned in Olivier's nightclub, called "Neolution." Paul and Sarah hide out in Felix's loft to avoid the neolutionists. The police continue to investigate Katja's body and are perplexed to find a DNA match between the body and the killer, and that Katja's fingerprints also match Beth's.
8	8	"Entangled Bank"	Ken Girotti	Karen Walton	May 18, 2013	0.367[5]
Paul blackmails Olivier into telling Leekie that there was only one clone who attacked, Helena. Leekie tells Paul he has a new job for him, and then arranges for Olivier to be killed. Delphine tells Leekie that Cosima made a pass at her, and he pushes Delphine to find out how many clones Cosima has had contact with. Cosima and Delphine sleep together, and then Delphine spies on her, giving the names of the clones to Leekie, but neglecting to mention Kira. Art goes to the morgue to check 'Sarah's' body, and this leads him to Felix. They question Felix, and realize that he is the one who made an anonymous call to Art with information about Beth. Alison takes vengeance on Aynsley whom she suspects of being her monitor by having sex with her husband Chad (Eric Johnson). Aynsley finds out, and confronts Alison, and the two fight. Sarah introduces Alison to Mrs. S and tells her about the clones. While they are talking, Kira finds Helena at the front door, and follows her out into the street. Kira is very kind to Helena, but when she hears her mother call, Kira goes to find her, and gets hit by a car.
9	9	"Unconscious Selection"	TJ Scott	Alex Levine	May 25, 2013	0.253[5]
Kira is taken to the hospital, where it appears that she has accelerated healing. Alison returns home to find that Aynsley is holding an intervention regarding her past behavior and addictions, where under Felix's encouragement, Alison turns the tables by scrutinizing Aynsley. Art finds CCTV footage of the train station where Beth committed suicide, and discovers that Sarah has been impersonating her. Cosima learns that Delphine leaked the names of the clones to Leekie, and confronts her. Delphine reveals that she knows about Kira's existence but decided not to tell Leekie, knowing her life could come in danger should he know (Kira is the only known biological child of a clone). Sarah meets with Leekie, who wants her to save Helena from the Proletheans, the extremists who indoctrinated her. Tomas punished Helena for defying orders, but she is later rescued by Sarah, and turns against Tomas. They later return to Mrs. S, who has reached her contacts in England, and meet with Amelia (Melanie Nicholls-King), Sarah's birth mother. Amelia reveals that she gave her away and fled after realizing she was a surrogate mother to Dyad scientists. Furthermore, Amelia gave birth to twins; Helena is Sarah's twin sister.
10	10	"Endless Forms Most Beautiful"	John Fawcett	Graeme Manson	June 1, 2013	0.376[7]
As Amelia meets Helena, police arrive to arrest Sarah, while Helena escapes. Sarah is about to tell Art the whole story, but gets spirited away by Daniel Rosen (Matthew Bennett), a Dyad operative. Sarah is brought to Rachel Duncan, a clone who is high in the Dyad organization. She offers Sarah and Kira protection. Leekie also offers the same to Alison and Cosima, as Cosima begins to display symptoms of a respiratory illness that Katja had. Alison confronts Aynsley a final time, ending with Alison watching Aynsley accidentally choke to death on her own scarf. Amelia tells a woman who appears to be Sarah that Mrs. S. is not who she says she is, but this 'Sarah' turns out to be Helena who stabs Amelia, blaming her for turning her over to the Proletheans. When Sarah finds her body, she shoots Helena. Alison signs Leekie's document, while Sarah goes to meet Rachel, planning to sign as well. However on the way, Cosima and Delphine decipher a code inside the clone genome; "this organism and derivative genetic material is restricted intellectual property." Cosima warns Sarah, who leaves Dyad without signing the contract. She returns to discover Mrs. S.'s home ransacked, and Kira and Mrs. S gone.

Season 2 (2014)

All titles of the second season are quotes from the works of Sir Francis Bacon.^[3]

No. overall	No. in season	Title	Directed by	Written by	Original air date	U.S. viewers (millions)
11	1	"Nature Under Constraint and Vexed"	John Fawcett	Graeme Manson	April 19, 2014	0.620[7]
Sarah runs to a nearby diner, where she is quickly confronted by two armed men, one of whom is Mark Rollins (Ari Millen), who attempt to bring her in. They kill the diner's owner (who shoots one of the men in the process), but Sarah manages to escape. She finds Felix and gets Alison to give them access to an unregistered gun so she could get Rachel to bring her to Kira and Mrs. S, as she believes Dyad has kidnapped them. Sarah impersonates Cosima at Dyad to steal Leekie's passkey and confronts Rachel, who reveals she does not have Kira. Alison, who tries to kick her addiction to pills, is chosen as the lead in the community musical replacing the now dead Aynsley. Leekie wants Cosima to start working for Dyad. With nowhere else to go for help, Sarah goes to Art's home with the intention of telling her whole story. Art, who is investigating the diner shooting, identifies the perpetrators as Proletheans; they are likely the ones who have Kira. Meanwhile, a wounded Helena stumbles into a hospital.
12	2	"Governed by Sound Reason and True Religion"	John Fawcett	Karen Walton & Graeme Manson	April 26, 2014	0.718[8]
Kira calls Sarah, and Art traces it to a motel. Sarah gets kidnapped, while Art has a run-in with Daniel, later resulting in his suspension. Sarah is taken to Mrs. S, who reveals she ran away with Kira and made it look like a kidnap. They go to a country house owned by two compatriots. Later at night, Kira admits she no longer trusts Mrs. S, so she and Sarah attempt to escape. Mrs. S learns that her compatriots plan to sell Kira to the Proletheans; she kills the two to allow Kira and Sarah to escape. Meanwhile, during Aynsley's funeral, Alison begins to suspect that Donnie was her monitor all along, so she and Felix set a trap for him, confirming her suspicions. Alison returns to drinking from the guilt of Aynsley's death. Cosima and Delphine set up a new lab at the Dyad institute to learn more about the former's condition. Art's partner Angela Deangelis (Inga Cadranel) learns of Helena's existence, but when she visits the hospital, Mark takes Helena away to a ranch owned by Henrik Johanssen (Peter Outerbridge), the Prolethean leader who plans to use Helena to create a baby. Henrik then has Tomas killed for objecting.
13	3	"Mingling Its Own Nature With It"	TJ Scott	Alex Levine	May 3, 2014	0.450[9]
Sarah, Felix and Kira arrive at a house belonging to Cal Morrison (Michiel Huisman), who is revealed to be one of Sarah's marks and Kira's father. He allows the three to stay for a little while. Felix returns to the city to support Alison in her play. Angela tries, and fails, to befriend Alison to learn more about the lookalikes. Before the debut, Alison drinks too much and then falls off the stage during her performance. Cosima and Delphine investigate the death of Jennifer Fitzsimmons, a clone who died from the same respiratory illness as Katja and Cosima. They autopsy the body and believe that the illness is possibly linked to the clones' infertility. Art begins to surveil Henrik's ranch, as Henrik confirms Helena, then takes her away to a room. Daniel, who spent the episode looking for Sarah, tracks her down and kidnaps her, while also murdering a local police officer. Cal finds them, and he crashes his truck into their car.
14	4	"Governed as It Were by Chance"	David Frazee	Russ Cochrane	May 10, 2014	0.484[10]
Cal and Sarah hide the car and the assumed dead Daniel. Sarah leaves Kira with Cal and returns to Mrs. S's home with Felix, where they find news clippings of Susan and Ethan Duncan, the founders of Leda, the cloning project, and Rachel's adoptive parents. Mrs. S, meanwhile, reunites with Carlton Redding (Roger R. Cross), who helped smuggle her and Sarah out of London. Helena escapes from the ranch after Henrik's daughter Gracie (Zoe De Grand Maison) tries to kill her, and remembers that Henrik took something from her. Alison wakes up in rehab. She is told by Donnie that she will not see her children unless she stays a week. Sarah sneaks into Rachel's apartment, only to be captured by the very much alive Daniel. As he tortures her, Helena arrives and kills Daniel. In the ranch it is revealed that Henrik took Helena's egg cells for in vitro fertilization.
15	5	"Ipsa Scientia Potestas Est"	Helen Shaver	Tony Elliott	May 17, 2014	0.510[11]
Rachel has Paul replace Daniel as her monitor and lover, while also withholding a stem cell treatment for Cosima. Despite this, Leekie plans to treat Cosima anyway. He later confides in Cosima that the original clone genome was lost in a lab fire; the genome would have provided the cure for the illness. Meanwhile, Paul, under Rachel's orders, storms in on Felix and get his fingerprints on Daniel's gun to frame him for the police officer's murder. He gives Sarah until morning to produce Kira. Sarah places Helena in Art's custody to learn more about the Proletheans. Helena escapes, but provides Art and Sarah clues to the location of Maggie Chen's locker. There, the two find clues relating to Ethan Duncan's location, and that Helena intends to assassinate Rachel. Sarah finds Helena and talks her out of killing Rachel, and under Leekie's promise that he will drop the charges against Felix, the two set off to find Ethan.
16	6	"To Hound Nature in Her Wanderings"	Brett Sullivan	Chris Roberts	May 24, 2014	0.541[12]
Sarah and Helena arrive at a church where Ethan has been. Sarah visits the archives to learn more about Ethan, and with the aid of Art and Felix investigating the files from Maggie's locker, learns that he changed his name to Andrew Peckham. Helena finds a bar and makes a connection with a local man Jesse, but she is later arrested for fighting with some drunks. Mark and Gracie later invite Helena back to Henrik's ranch to allow herself to be inseminated with her own fertilized eggs. Scott Smith (Josh Vokey), a fellow student of Cosima's, joins her and Delphine at Dyad, and learns that the stem cells Cosima was given belong to Kira. At rehab, Alison befriends Vic, who is later revealed to be an informant for Angela to get dirt on Alison. Sarah arrives at a house to see Mrs. S at the door, her old contacts having protected a scientist years ago. Sarah meets Ethan (Andrew Gillies), who informs Sarah that he started the clone project until it was hijacked by Leekie and the neolutionists in 1977. He also fears Leekie, who was behind Susan's death.
17	7	"Knowledge of Causes, and Secret Motion of Things"	Ken Girotti	Aubrey Nealon	May 31, 2014	0.497[13]
Alison reveals to Vic that she let Aynsley die, then learns he is Angela's informant. Vic promises not to tell Angela if he sees Sarah. She sees Vic at rehab, but Felix has drugged him, and he collapses. As Alison and Felix hide Vic, Sarah is mistaken for Alison and is forced to attend "Family Day", ultimately resulting in Donnie finding out about the clones, and that Alison was telling the truth about being probed. Mrs. S. and Paul arrange a meeting between Rachel and Ethan. After Ethan tells Rachel of her mother's fate, Rachel fires Leekie, and also implies to him that Dyad will be after him. Cosima is angered at Delphine for using Kira's stem cells from a tooth during the car accident. Kira willingly decides to give Cosima another tooth for analysis. Donnie goes to confront Leekie for lying to him, and accidentally shoots him in the head.
18	8	"Variable and Full of Perturbation"	John Fawcett	Karen Walton	June 7, 2014	0.576[14]
Art receives a call on Beth's old cell phone from Tony, a transgender clone who promises his dying friend, Sammy, that he will deliver a message to Beth. Tony stays at Felix's apartment until Sarah arrives to tell him that Beth is dead, and reveals his origin. Tony delivers the message; "Tell Beth to keep the faith. Paul's like me. He's on it. He's a ghost." Alison learns Donnie intends to leave, prompting her to admit to being responsible for Aynsley's death. There, Donnie confesses to killing Leekie, and the two begin work to cover up. Sarah and Mrs. S agree to transport Ethan Duncan to the Dyad to start work on a synthetic therapy that may cure Cosima of her illness. Ethan reveals to Rachel that the clones were always intended to be infertile, and views Sarah as a "failure". Before leaving, he hands Kira the book The Island of Doctor Moreau, which houses all of his secrets in its margins. As Ethan and Cosima begin to work, Cosima collapses and goes into violent convulsions.
19	9	"Things Which Have Never Yet Been Done"	TJ Scott	Alex Levine	June 14, 2014	0.613[15]
Rachel appoints Delphine as Leekie's replacement for director of clone research. Learning that Kira's bone marrow might save Cosima, Sarah asks Kira, who agrees to donate some. As Alison and Donnie work to bury Leekie in their garage, Vic returns to either blackmail her or discover new dirt for Angela. Suspecting that Angela's operation is not official, a newly assertive Donnie confronts Angela to chase them both away. Burying Leekie causes the couple to have a new-found passion, and they have sex. Helena and Gracie are implanted with Helena's eggs fertilized with Henrik's sperm. Helena comes to learn that Henrik intends to impregnate several other women with Helena's eggs, she helps Gracie and Mark run away while Helena kills Henrik and burns the farm down. Rachel, disillusioned at the prospect of not being able to have children, tricks Delphine into distracting Sarah; while Rachel, posing as Sarah, abducts Kira.
20	10	"By Means Which Have Never Yet Been Tried"	John Fawcett	Graeme Manson	June 21, 2014	0.538[16]
Sarah surrenders to Dyad hoping to secure Kira's safety, but is imprisoned, as is Ethan. Rachel deliberately separates Delphine from Cosima by sending her to Germany. Ethan commits suicide by poisoning his tea to prevent Rachel from getting the code key. Kira, meanwhile, steals a cell phone and contacts Cal, who goes to Mrs. S. They meet Paul, who is revealed to be in the military, and Marion Bowles (Michelle Forbes), a Dyad executive, who agrees to help rescue Kira and Sarah. Scott and Cosima devise a plan to break Sarah free by making a make-shift weapon out of a fire extinguisher. Rachel sabotages Cosima's treatment by destroying the bone marrow, at which point Sarah uses the weapon, shooting a pencil into Rachel's eye. They all escape Dyad with Marion's aid, who invites Sarah to meet her the next day. That night, Sarah introduces Alison and Cosima to Helena and party. The next morning, Helena leaves, but is kidnapped by the military, arranged by Paul and Mrs. S. Kira hands Cosima the novel with Ethan's sequences needed to save her life. Sarah visits Marion's home, and meets Charlotte, a clone of Kira's age and the only survivor of the second Leda batch. Marion explains that the military controlled a male clone project, Castor, with the clones looking like Mark.

Season 3 (2015)

All titles of the third season are quotes from the farewell address of Dwight Eisenhower.^[17] The premiere episode debuted on all five of AMC Networks' cable channels–BBC America, AMC, IFC, SundanceTV and WE tv–and received 1.27 million cumulative viewers across all five airings.^[18] Likewise, in Canada, the season premiere was simulcast on Space, CTV, Bravo, and MTV Canada.^[19]

No. overall	No. in season	Title	Directed by	Written by	Original air date	U.S. viewers (millions)
21	1	"The Weight of This Combination"	David Frazee	Graeme Manson	April 18, 2015	0.535[18]
While Cosima's condition is improving, Delphine takes over Rachel's duties at Dyad, but the two break up. Delphine shows Sarah a video of two Castor clones, Rudy and Seth, attempting to abduct Krystal Goderitch, a Leda clone; Rudy is the imprisoned clone in Marion's house. After Rudy tells Sarah to "count your sisters", she learns Helena is missing and further resents Mrs. S for taking part in her disappearance. Later Topside official Ferdinand (James Frain) arrives to talk to Rachel. Sarah impersonates her to avoid him knowing of her condition. Sarah learns that Ferdinand took part in "Helsinki", assassinating six self aware Leda clones in Finland, and he is under Rachel's orders to kill those in the Clone Club, starting with Alison. Delphine manages to learn about Ferdinand's purpose through torturing the now brain-damaged Rachel and manages to have him call off the assassinations. Meanwhile, Alison decides to run for school trustee against Marci Coates (Amanda Brugel) to oppose the latter's plans on rezoning the school district. Seth breaks Rudy free.
22	2	"Transitory Sacrifices of Crisis"	John Fawcett	Aubrey Nealon	April 25, 2015	0.420[20]
Sarah learns from Art that Rudy and Seth assaulted a woman in a hotel and took a lock of her hair. Seth is revealed to be suffering from a degenerative disorder. Helena is being held in a controlled military zone and subjected to testing where her captor Doctor Virginia Coady (Kyra Harper) learns of her pregnancy. Rudy and Seth search for the original clone tissue in Felix's apartment. Rudy holds Kira hostage to gather information from Sarah. When Seth suffers a seizure outside while holding a knife to Cal, Rudy retreats and ends Seth's suffering by killing him. Realising Kira is not safe with Sarah, she and Cal move to Iceland while Sarah goes to look for Helena. Meanwhile, Cosima and Scott work with Dr. Nealon to understand Cosima's recovery, despite her and Scott's lack of trust for him. Alison and Donnie hatch a plan to turn the tide for her campaign by buying Ramon's drugs.
23	3	"Formalized, Complex, and Costly"	John Fawcett	Chris Roberts	May 2, 2015	0.443[21]
Art and Sarah work together to find a lead on Mark's location. Mark reveals to Gracie that he was sent by the military to infiltrate the Proletheans to find the original Castor DNA, which he believes Henrik entrusted to farmer Willard Finch (Nicholas Campbell) for safe keeping. It is believed the DNA would be used to cure the Castor defect. Gracie recovers the box from Finch, but there is no DNA inside. Henrik's wife Bonnie (Kristin Booth) tracks Gracie down to bring her back to the Proletheans. Sarah learns that Art is devoted to helping the Clone Club because he was in love with Beth. Cosima extracts Seth's brain and learns that like the Leda clones, the Castor clones are also suffering from a defect, albeit a neurological one, as well as determining that both sets of clones are biological siblings. Alison gains support for her campaign after selling the other mothers drugs hidden in bars of soap. Nealon treats Rachel's brain damage. Mark confronts Finch again but he dies from a heart attack during the torture. Sarah's arrival is soon followed by Bonnie, who shoots Mark.
24	4	"Newer Elements of Our Defence"	Chris Grismer	Russ Cochrane	May 9, 2015	0.406[22]
Sarah evades Bonnie and escapes with a wounded Mark. They arrive at an empty house where Sarah treats Mark's wounds. When Mark loses consciousness, Sarah recovers his motel key and finds Henrik's box, where she learns he worked with Ethan, and Henrik used the DNA to produce his own clone, Abel. When Mark finds her, he reveals the baby died shortly after birth, so they go to a grave yard to recover his body. Gracie's pregnancy ends with a miscarriage, and Bonnie, believing it to be punishment from God for marrying Mark, shuns her. Alison finds herself wanted by Ramon's boss, who is revealed to be her ex-boyfriend Jason Kellerman (Justin Chatwin). The two decide to work together to distribute the drugs. Felix sets up a dating profile for Cosima to get over Delphine. Helena manages to escape from her cell and comes across a sick Castor clone, Parsons, that Coady is experimenting on. Helena kills him out of mercy before she is captured again. Sarah recovers Abel's remains, but it is intercepted by Rudy. Sarah attempts to flee, but Mark and Rudy capture her.
25	5	"Scarred by Many Past Frustrations"	David Frazee	Alex Levine	May 16, 2015	0.460[23]
Sarah is taken to the Castor base, much to Paul's dismay. Sarah also has a strained reunion with Helena, who blames her for her capture. Although Coady assures Paul no harm would come to Sarah, she still collects a lot of her blood to gather stem cells. Cosima goes on a blind date with Shay Davydov (Ksenia Solo), a holistic healer, and quickly begin a physical relationship. However, the date is monitored. Gracie, with nowhere to go, approaches Art, who takes her to Felix and Mrs. S. There, Gracie comes out of her shell and parties with the others, getting drunk before suffering a seizure, displaying bloodshot eyes. Sarah and Helena plot an escape, and Helena successfully exits her cell, but she decides to leave Sarah behind. As she is about to leave the compound, she begins to have second thoughts.
26	6	"Certain Agony of the Battlefield"	Helen Shaver	Aubrey Nealon	May 23, 2015	0.393[24]
Paul discovers the hair samples from the women the Castor clones assaulted, and discovers Sarah was given some of Rudy's blood and is suffering from negative side effects. Alison makes lots of money from the drug deals and plots with Jason to expand further by buying her mother's beauty shop Bubbles to be used as a front. In an attempt to find Sarah, Felix has Scott bring him to Rachel to learn her location but Rachel does not know. However, Scott realizes that Rachel was painting symbols from Ethan's notes. Cosima examines Gracie and learns that the Castors' defect is sexually transmitted that renders women infertile. Paul has Coady arrested and takes charge of the base until reinforcements arrive. However, he later realizes that even his superior David Benchman (Tom Barnett) is conspiring against him, as Coady is planning to weaponize the defect. Rudy is recalled from searching for Helena to help Coady. Paul helps Sarah, who has recovered, to escape, but he decides to stay behind. He kills a Castor clone, Miller, but is stabbed in the process. While, Sarah finds Helena, who returned for her sister, Paul urges Coady to stop. When she responds by shooting him, a dying Paul releases a grenade, destroying Abel's remains.
27	7	"Community of Dreadful Fear and Hate"	Ken Girotti	Sherry White	May 30, 2015	0.372[25]
After escaping the Castor camp, Sarah and Helena await at a local bar and are met by Mrs. S. Helena wants to kill her for selling her out. The confrontation escelates to a fight, but the two eventually reconcile. Delphine approaches Cosima to ask for a urine sample, but Cosima decides to double cross her by asking Alison to give hers. Meanwhile, Alison's mother Connie (Sheila McCarthy) refuses to sell her store. Furthermore, when Donnie and Jason pay their supplier Pouchy (Tony Cianchino), Donnie accidentally gives Alison's signatures that support her campaign. Pouchy holds Donnie until the money arrives. Cosima poses as Alison for the photography shoot. Alison pays Pouchy, and she has Donnie released. While Jason kisses Cosima-as-Alison, Alison manages to give out her impassioned speech, gaining more support over Marci. Connie decides to sign the papers to Bubbles. Alison turns down Cosima's attempt to give her the urine sample, suspecting her illness has resurfaced when she begins coughing again. Later, Cosima notices bleeding from her groin during a bath with Shay.
28	8	"Ruthless in Purpose, and Insidious in Method"	Aaron Morton	Graeme Manson & Chris Roberts	June 6, 2015	0.522[26]
Helena moves in with Alison, Donnie and Gracie and helps the couple work in Bubbles, the shop that is their drug front. When Donnie learns Jason wants a second chance with Alison, Donnie confronts him, ending with Jason knocking Donnie out cold. Scott wants Rachel to decode the symbols in Ethan's The Island of Doctor Moreau book, but she will only do it if she escapes to Taiwan with a new life, using Krystal's identity. Sarah and Felix go to Krystal's place of work, a beauty salon, where Felix poses as a customer to steal her wallet. There, Felix finds that, although Krystal is not a self aware Leda clone, she began investigating her attempted kidnapping. Rudy confronts Scott and steals the book. Scott, however, has made a copy. After Rachel escapes Dyad, she begins the translating, but is intercepted by Nealon. From what Sarah and Felix gathered, they believe the Castor original is in London. Cosima resigns from Dyad, and Delphine fires Scott for lying about the book. Nealon smuggles Rachel away for a prosthetic eye surgery while using Krystal's identity. The neolutionists have kidnapped and held the real Krystal in a medically-induced coma in Rachel's place at Dyad.
29	9	"Insolvent Phantom of Tomorrow"	Vincenzo Natali	Russ Cochrane	June 13, 2015	0.401[27]
Felix, Sarah and Mrs. S arrive in London to meet with Terrance (Daniel Fathers) who believes Ethan's coded numbers relate to a prisoner identity. As he investigates, Ferdinand waits for him, who has Terrance beaten to death before he can reveal anything. Cosima comes to believe that Shay is a spy working for Castor. When Delphine interrogates her, she intends to kill her and make it look like a suicide. However, Cosima calls her off when it was in fact Gracie who betrayed them to help Mark. Pouchy demands that Donnie return the drugs, keeping the canister with Helena's eggs as collateral. Donnie and Helena return the drugs, but Helena kills Pouchy and his crew after they threaten Alison's children, and takes all of the money. Sarah takes Terrance's phone, leading to the address of Kendall Mallone (Alison Steadman), Siobhan's mother. It is revealed that Kendall is the original to both Leda and Castor, as she is a Chimera.
30	10	"History Yet to Be Written"	John Fawcett	Graeme Manson	June 20, 2015	0.428[28]
Kendall returns with the others, where Coady has Rudy follow Alison to her location. Delphine and Sarah make a deal with Ferdinand to stop Coady. Sarah tracks down Gracie and Mark, who decide to stay together until he dies. Mark assists them by posing as Rudy and calls Coady for Kendall's location, revealed to be a red herring, and Ferdinand captures Coady. Alison lures Rudy to her garage, where Helena waits for him. Rudy begins seizing from his defect, allowing Helena to kill him. Delphine realizes that Krystal has taken Rachel's place in Dyad's ward, and has Nealon arrested. Nealon reveals that the neolutionists run Leda and Castor. Delphine is later forced to kill Nealon when he attacks her. Ferdinand learns of Nealon's agenda and defects after learning that he was being used (Ferdinand despises the neolutionists). Later, Delphine reconciles with Cosima, before she is shot by an unseen figure. The Clone Club and their families, along with Art and Scott, gather at Bubbles to celebrate their victory and Alison's election win, and to remember Beth. Helena is reunited with Jesse. Rachel is being held in a house where she reunites with Susan Duncan, who faked her death and now has Charlotte, the youngest clone. The season ends in Iceland where Kendall is sent to hide, and Sarah reunites with Kira.

Season 4 (2016)

All season 4 titles are quotes from the works of Donna Haraway.^[29]

No. overall	No. in season	Title	Directed by	Written by	Original air date	U.S. viewers (millions)
31	1	"The Collapse of Nature"	John Fawcett	Graeme Manson	April 14, 2016	0.229[30]
32	2	"Transgressive Border Crossing"	John Fawcett	Russ Cochrane	April 21, 2016	0.271[31]
33	3	"The Stigmata of Progress"	Ken Girotti	Aubrey Nealon	April 28, 2016	0.242[32]
34	4	"From Instinct to Rational Control"	Peter Stebbings	Alex Levine	May 5, 2016	0.218[33]
35	5	"Human Raw Material"[34]	TBA	TBA	May 12, 2016	TBD
36	6	"The Scandal of Altruism"[34]	TBA	TBA	May 19, 2016	TBD
37	7	"The Antisocialism of Sex"[34]	TBA	TBA	May 26, 2016	TBD

References

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External links

• Orphan Black at Space
• Orphan Black at BBC America
• List of Orphan Black episodes at the Internet Movie Database