Are we all more racist than we realise or would like to admit? For a new Channel 4 documentary, Jane Elliott, a controversial former schoolteacher from Ohio, is recreating the shocking exercise she used 40 years ago to teach her nine-year-old pupils about prejudice. Elliott is asking 30 adult British volunteers - men and women of different ages and backgrounds - to experience inequality based on their eye colour, to show how susceptible we can all be to bigotry, and what it feels like to be on the other side of arbitrary discrimination. Does Elliott's exercise still have something to teach us four decades on, and in a different country? Charlie Brooker doesn't think so. Presented by Krishnan Guru-Murthy, and broadcast as part of the Race: Science's Last Taboo season, the exercise is observed throughout by two expert psychologists, Prof Dominic Abrams and Dr Funké Baffour, who will be unpicking the behaviour on display.