Equus by Peter Schaffer
Shaffer’s masterpiece tells the story of a psychiatrist attempting to treat a young man who has committed a brutal crime. The play’s action has the structure of a detective story as the psychiatrist unpicks the past to understand the young man’s actions. The original Broadway production (starring Anthony Hopkins as the psychiatrist) won best play. It was successfully revived in 2007 with Daniel Radcliffe as the young patient.