Decent enough if unremarkable English-language take on Oliver Hirschbiegels superior Das Experiment, which itself was adapted from a novel (Black Box) which was inspired by a real experiment carried out at Stanford University in 1971. It was funded by the US Navy, and it was abandoned after only six days, when it went tits-up.

The story: a bunch of people are interviewed, and 24 are selected to participate in a social experiment: they are to be coached out to a camera-ed up detention centre, where eight will be selected to play the role of prison guards while the remaining sixteen will adopt... read the rest.