In a compelling and at times disturbing series, Dr Michael Mosley explores the brutal history of experimental psychology.To begin, Michael traces the sinister ways this science has been used to try to control our minds.

In this film, Michael investigates how scientists have struggled to understand that most irrational and deeply complex part of our minds - our emotions.

Dr Michael Mosley concludes his series exploring the brutal history of experimental psychology by looking at how experiments on abnormal brains have revealed the workings of the normal brain.

Michael Mosley embarks on three journeys to understand science's last great frontier - the human mind - as he traces the history of the attempts to understand and manipulate the brain