The Brain: A Secret History [is] a television series which reveals how much we have learnt about ourselves through the work of some of the 20th century's most influential, and deeply flawed, psychologists. In the course of making the series we found rare archive and first-hand accounts of the many inventive and sometimes sinister ways in which experimental psychology has been used to probe, tease, control and manipulate human behaviour. High on the list of psychologists ... was Stanley Milgram. Some claim that what Milgram did was ethically and scientifically dubious. I have always thought it was justified and hugely important, but I had never had the chance to interview any of the volunteers" who had unwittingly taken part in his notorious experiment, to get their perspective. What Bill and the other volunteers who took part weren't told was that the electric shocks were fake - and that both the Experimenter and the Learner were actors. The real purpose of the experiment was to see how far the volunteers would go. Stanley Milgram had asked colleagues how many people they thought would go all the way and administer a lethal 450-volt shock. Most said less than 1 per cent - and those would probably be psychopaths. Yet Bill, like 65 per cent of the volunteers, gave an apparently lethal electric shock when told to do so.