Are You Good or Evil?

What makes us good or evil? It's a simple but deeply unsettling question. One that scientists are now starting to answer. Horizon meets the researchers who have studied some of the most terrifying people behind bars - psychopathic killers. But there was a shock in store for one of these scientists, Professor Jim Fallon, when he discovered that he had the profile of a psychopath. And the reason he didn't turn out to be a killer holds important lessons for all of us. We meet the scientist who believes he has found the moral molecule and the man who is using this new understanding to rewrite our ideas of crime and punishment.

Other episodes for this season

Do You See What I See?
Episode 1 - Do You See What I See?
Seeing Stars
Episode 2 - Seeing Stars
The Nine Months That Made You
Episode 3 - The Nine Months That Made...
The Core
Episode 4 - The Core
Are You Good or Evil?
Episode 5 - Are You Good or Evil?
Fukushima: Is Nuclear Power Safe?
Episode 6 - Fukushima: Is Nuclear Pow...
Playing God
Episode 7 - Playing God
The Truth About Exercise
Episode 8 - The Truth About Exercise
Solar Storms: The Threat to Planet Earth
Episode 9 - Solar Storms: The Threat...
Out of Control?
Episode 10 - Out of Control?
The Truth about Fat
Episode 11 - The Truth about Fat
Global Weirding
Episode 12 - Global Weirding
Defeating Cancer
Episode 13 - Defeating Cancer