Orphan Black (2013–2017)
3 user 11 critic

Ipsa Scientia Potestas Est 

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 ... See full summary »


Helen Shaver


John Fawcett (created by), Graeme Manson (created by) | 13 more credits »

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Episode cast overview, first billed only:
Tatiana Maslany ... Sarah Manning / Cosima Niehaus / Helena / Rachel Duncan
Dylan Bruce ... Paul Dierden
Jordan Gavaris ... Felix Dawkins
Kevin Hanchard ... Detective Art Bell
Evelyne Brochu ... Delphine Cormier
Maria Doyle Kennedy ... Siobhan Sadler (credit only)
Michiel Huisman ... Cal Morrison
Matt Frewer ... Dr. Aldous Leekie
Peter Outerbridge ... Henrik Johanssen
Skyler Wexler ... Kira Manning
Matthew Bennett ... Daniel Rosen
Kristin Booth ... Bonnie Johanssen
Ari Millen ... Mark Rollins
Zoé De Grand Maison ... Gracie Johanssen (as Zoe de Grand'Maison)
Josh Vokey ... Scott


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 use Felix to help Rachel. Leekie, unlike Rachel, shows that his plans veer toward the truly scientific, he who provides Cosima and Delphine with some information about the clones' past. Feeling indebted to Helena for saving her from Rosen, Sarah decides to help Helena within the bounds of what Sarah believes is right. Helena may have thoughts of her own about what she wants to achieve. But she also provides both Art and Sarah with some information about Maggie Chen, which they in turn use to find out more about Rachel's past. Cal and Kira are still hiding out in Cal's motor-home, Kira who hints about Sarah's "sisters". And Henrik and Bonnie have Gracie confined for what she did regarding Helena, which Gracie may have to pay for in more ways than one if Helena is not retrieved. Written by Huggo

Plot Summary | Add Synopsis


Action | Drama | Sci-Fi


TV-14 | See all certifications »






Release Date:

17 May 2014 (USA) See more »

Company Credits

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Technical Specs



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Did You Know?


The title, "Ipsa Scientia Potestas Est," is a latin phrase meaning "knowledge itself is power." It is a quote from Sir Francis Bacon's "Meditationes Sacrae" (1597). See more »


In a brief shot of Helena at 10:43, we see someone other than Tatiana Maslany: presumably her stand-in, though no other clones are in this scene. See more »


[first lines]
Dr. Aldous Leekie: Rachel, you don't need to see this.
Rachel Duncan: I demanded to. Now, move.
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The Colors
Performed by Hexes & Ohs
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User Reviews

Rachel Duncan acts rude and Helena is out for revenge
13 December 2018 | by DVD_ConnoisseurSee all my reviews

This is a busy episode with multiple plots coming on in leaps and bounds.

Tatiana Maslany is simply marvellous. Rachel Duncan is the latest clone to be shown and she's a real piece of work, treating Paul like a piece of meat. Meanwhile, Helena has Rachel in her sights - quite literally.

9 out of 10.

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