A disturbing French TV documentary has tried to demonstrate how well-meaning people can be manipulated into becoming torturers or even executioners.
The hugely controversial Game of Death was broadcast in prime-time on a major terrestrial channel, France 2, on Wednesday.
It showed 80 people taking part in what they thought was a game show pilot.
As it was only a trial, they were told they wouldn't win anything, but they were given a nominal 40 euro fee.
Before the show, they signed contracts agreeing to inflict electric shocks on other contestants.
One by one, they were put in a studio resembling the sets of popular game shows.