Blue/Orange by Joe Penhall enjoys the dubious status of a modern classic. A black mental-health patient, Christopher, is about to be freed from a clinic but his cautious young shrink, Bruce, wants to keep him under observation. His senior colleague, Robert, thinks a dose of the big bad world will help to cure the nervy, delusional Christopher, who claims Idi Amin as his father and insists that all oranges are blue.