With the exception of Hamlet, Othello is Shakespeare's most controversial play. It is also his most shocking. Dr Johnson famously described the ending as "not to be endured", and H.H. Furness, after editing the Variorum edition of the play, confessed to wishing that "this tragedy had never been written". No play in performance has prompted more outbursts from onlookers: there are many recorded instances of members of the audience actually trying to...