Clunk, clunk, clunk. John Gabriel Borkman opens with the obsessive footfalls of a disgraced banker as he prowls the attic of a shabby townhouse. On a beaten-up sofa lies Gunhild, his estranged wife, who guzzles Coke and watches TV game shows. The whole place stinks of stagnation and failure. The reclusive Borkman was once the country’s best-known banker until envious colleagues accused him of embezzlement and got him sent to jail for five years.