Das Experiment (2001)
All I can say by way of a summary is that this film is based off of the Stanford Prison Experiment in 1971.
It’s a nice and tense film that at one point made me feel a bit claustrophobic. The ending was a bit quick and didn’t tie up anything considering there was much to tie up.
Beware of the weaker American remake The Experiment.
Where can I see it?
Available on DVD.