Orphan Black (2013–2017)
2 user 9 critic

Knowledge of Causes, and Secret Motion of Things 

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.



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Episode cast overview, first billed only:
Detective Art Bell (credit only)
Kira Manning
Detective Angela DeAngelis


Sarah and Mrs. S are helping Ethan Duncan gather together his necessary materials to bring into Dyad as a bargaining chip. Despite this action, Sarah still does not fully trust Mrs. S. Mrs. S, however, learns some information, which she and Sarah decide to use as a means to orchestrate a showdown between Leekie and Rachel, one of the two who they cannot see but go down in the process. Cal discovers that he is being watched, and thus has to relocate himself and Kira. Through the process, he still tries to find out what Sarah is hiding while contemplating a future for his new family. At rehab, Alison decides to confide in Vic, which she quickly learns is a bad move as she overhears him speaking to Detective DeAngelis on the telephone. She will require some help from both Felix and Sarah to help her get out of this predicament, which could be a problem with the masses descending on the facility for family day. Through the mêlée, Alison learns the truth behind Donnie as her monitor. And ... Written by Huggo

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Action | Drama | Sci-Fi


TV-14 | See all certifications »




Release Date:

31 May 2014 (USA)  »

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Did You Know?


Ethan Duncan is reading "The Island of Dr. Moreau" by H.G. Wells to Kira. In the novel, Doctor Moreau has fled to an island after being exposed for performing vivisections that combined humans and animals and he and his creations are met by a shipwreck survivor who happens upon the island when the ship that rescued him stops there. See more »


After Felix slips Vic a mickey, he tells Sarah it was benzodiazepine. Benzodiazepine is the umbrella name for the class of psychoactive drugs, including Valium, Klonopin, Ativan, Xanax, Librium, Rohypnol, et al. The proper usage would "I slipped him a benzodiazepine." See more »


Ethan Duncan: Rachel. My dear, dear Rachel.
Rachel Duncan: Hello, father.
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Main Title Theme
Written by Two Fingers
Performed by Two Fingers
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User Reviews

Easily the best episode so far.
16 July 2015 | by See all my reviews

The stakes, the drama, everything was perfect in this episode. This episode was great for the same reasons as episode 6 of season 1, with everything converging. That, combined with the new slickness of this season, makes a perfect episode. The show has always struck a delightful balance between comedy and drama, but this episode had more situational comedy, that was also somehow tense and dramatic. Most of the episode takes place around the rehab center. The crisis that sets the episode in motion is Vic's decision to tell the detective about Alison's murder. From there, everything collides, causing so many moments that will shake the very foundation of these character's lives for seasons to come. This season has been very saturated with technical reveals and plot twists, so it is really great to have an episode instead filled with dramatic reveals and shocking development for the characters. Alison's storyline is REALLY starting to feel like Breaking Bad, although the final scene of the episode reminded me more of Pulp Fiction.

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