The experiment. Part 4, Tyranny.

The last in a series of four programmes following a social experiment, the largest of its kind for 30 years, into power and social equality. For a period of 2 weeks 14 men are divided into two groups - 5 guards and 9 prisoners who have to attempt to live harmoniously with no external influence. Two psychologists watch the process and independant observers are on hand should the experiment get out of control. The objective is to see if a system of inequality turns good men into evil. In part 2, a tenth prisoner was introduced to the mix while in part 3 a core group of prisoners enabled a break out and infiltrated the guard's quarters. In this part the prisoners and guards decide to live as a commune although the experiment's two main 'trouble-makers' are not prepared to live in peace and rapidly collapse the new system.