'Betrayal is a new departure and a bold one . . . Pinter has found a way of making memory active and dramatic, giving an audience the experience of the mind's accelerating momentum as it pieces together the past with a combination of curiosity and regret. He shows man betrayed not only by man, but by time - a recurring theme which has found its proper scenic correlative . . . Pinter captures the psyche's sly manoeuvres for self-respect with a sardonic forgiveness . . . a master craftsman honouring his talent by setting it new, difficult tasks' New Society