The Brain -- A Secret History is a series about how various theories and experiments on the human mind over decades have led to profound insights into how the human brain works, but also have involved great cruelty and pose terrible ethical dilemmas. Historical experiments such as severe maternal deprivation, brainwashing and other experiments in mind control such as MKULTRA are covered, along with physical interventions such as the history of electric shock 'treatment', behaviour modification, experimental psychology, and the Milgram experiment.