The second episode reiterated many of the ideas of the first, but developed the theme that drugs such as Prozac and lists of psychological symptoms which might indicate anxiety or depression were being used to normalise behaviour and make humans behave more predictably, like machines. This was not presented as a conspiracy theory, but as a logical (although unpredicted) outcome of market-driven self-diagnosis by checklist based on symptoms, but not actual causes, discussed in the previous programme.