It is now well over three decades since the Hindi-film heroine drove the vamp into extinction, and even longer since the silver screen was ignited by the true Bollywood version of a cabaret. Yet, Helen-nicknamed 'H-Bomb' at the height of her career-continues to rule the popular imagination. Improbably, for an 'item girl'-who rarely appeared for more than five minutes in a movie-she has become an icon. Jerry...