Orphan Black

Orphan Black Season 4 Episodes

Find out how to watch Season 4 of Orphan Black tonight

Season 4 Episode Guide

Episode 1 - The Collapse of Nature

After two months of respite, Sarah’s hard-won sanctuary in Iceland is shattered by a Neolution attack. Sarah, Mrs. S, Kendall, and Kira are forced back on the run, once again fleeing from a potent, faceless enemy with far-reaching and insidious power.

  

Episode 2 - Transgressive Border Crossing

After evading a Neolution attack in Iceland, Sarah returns home to track down the elusive new ally that warned her to run. As she follows the trail, Sarah uncovers the next facet of Neolution’s agenda. As Cosima struggles with Delphine’s disappearance, Alison and Donnie host a pregnant and ever-hungry Helena. Meanwhile, Felix, feeling like an outsider, embarks on his own journey of self-discovery.

  

Episode 3 - The Stigmata of Progress

Sarah has a traumatic encounter as she investigates a shocking discovery of Neolution's biotech.

  

Episode 4 - From Instinct to Rational Control

Sarah realizes her goals have aligned with a former enemy and forms a precarious alliance in hopes of getting to the head of Neolution. Alison heads a mission to infiltrate a Neolutionist fertility clinic that Beth investigated, and sends Donnie and Felix in undercover. Back at the lab, Cosima and Scott receive a special delivery from Alison. As Rachel grows closer to Charlotte, Susan leaves a devastating decision in Rachel’s hands. A desperate Sarah returns to Dizzy needing his help again.

  

Episode 5 - Human Raw Material

Sarah’s day off to reconnect with Kira quickly turns into a sleuthing mission aimed squarely at discrediting Felix’s new ties. Cosima steps up with Donnie to further investigate the Neolutionist fertility research center. While Donnie bumps into an all too familiar face, Cosima makes a shocking discovery that leads her into a dangerous encounter.

  

Episode 6 - The Scandal of Altruism

When Cosima admits doubts about finding a cure in time to save her life, Sarah makes a dangerous decision that puts her family at risk. Meanwhile, Art and Felix team up to protect naïve clone Krystal Goderitch from herself.

  

Episode 7 - The Antisocialism of Sex

Sarah regresses to old habits while struggling to cope with a loss. Following in Beth’s footsteps, Sarah questions her strength to carry on.

  

Episode 8 - The Redesign of Natural Objects

Alison’s loyalty to the clones is questioned. Cosima makes a final attempt to discover a cure.

  

Episode 9 - The Mitigation of Competition

With Susan Duncan deposed, Sarah finds herself in the same position as Rachel, causing the arch enemies to come together for the greater good. Cosima and Susan butt heads on the ethical implications of human experiments. Meanwhile, when the Hendrixes legal counsel, Adele, further investigates Donnie’s case, she begins to suspect Felix is keeping deep secrets. Helena’s arrival forces Felix to make a difficult decision.

  

Episode 10 - From Dancing Mice to Psychopaths

When communication with Cosima is cut off and Neolution appears to be within striking distance, Sarah’s alliance with Rachel goes out the window. Sarah lures a high-level Neolutionist into a trap, and sets out to bring down Neolution once and for all.

  



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