What to do with old shows? While newly created works keep the performing arts alive, productions of existing material are the bread and butter of many theatrical institutions. But in our age of heightened awareness around representation of gender, race and ability, some plays show their age in ways that risk offending contemporary sensibilities. So do we just present them as is and damn the torpedoes? Or do we try to bring them up to date? These questions — never far from my consciousness as someone who regularly reviews productions at the Stratford and Shaw festivals, and elsewhere — were...