Broadcasting on Channel 4 at 9pm, Psychopath Night is a two-hour documentary I had the pleasure of scoring, alongside good friends and collaborators Sandy Nuttgens and Spike Scott.

Psychopaths are a ruthless breed who lie, manipulate and sometimes murder with no hint of conscience of remorse. One per cent of the population are classified as psychopathic. There may be one in your office. There could be one on your street. They are all around us, often in positions of power.

Psychopath Night unravels the mystery of this minority, with the help of leading experts. The programme goes inside the minds of psychopaths, finds out how to spot a psychopath, and meets real psychopathic killers.