Orphan black. Season four
- DVD TV SERIES (OSH)
English subtitles for the deaf and hard of hearing.
Tatiana Maslany, Jordan Gavaris, Kevin Hanchard, Ari Millen, Kristian Bruun, Dylan Bruce, Josh Vokey, Maria Doyle Kennedy, Skyler Wexler.
[London] : BBC Worldwide Ltd., 
Title from disc surface.
Originally broadcast as individual episodes on BBC America in 2016.
Special features: Back to the beginning: recreating the world of season one ; Beth, MK, and Ira: the clones of season four ; Body horror: the FX of season four ; Closer looks: an inside look at each episode.
With the threat of the Castor clones no longer plaguing them, the sisterhood's future looks bright. That is, until the past comes crashing back into their lives with the introduction of Neolution--the organization that has been pulling the strings all along. Forced to emerge from her Icelandic safe house, Sarah is lead down a dangerous path back to the clone that started it all: Beth Childs. As Sarah begins to crack under the overwhelming pressure of keeping her family safe, the sisters are pushed in disparate directions. But in order to survive, they will need to band together like never before, or be torn apart forever.
- The collapse of nature
- Transgressive border crossing
- The stigmata of progress
- From instinct to rational control
- Human raw material
- The scandal of altruism
- The antisocialism of sex
- The redesign of natural objects
- The mitigation of competition
- From dancing mice to psychopaths.