(Albert Magnoli, USA, 1984, 109 min; PG)   A time capsule of style and attitude. It does what musicals are supposed to do: It rides the underlying currents of its moment and renders them glorious. Loosely based on aspects of Prince’s life, it’s about a Minneapolis musician called “the Kid,” who wants to make a mark on the national scene. –San Francisco Chronicle   Prince and the Revolution were at the height of their powers and the hits ‘Purple Rain,’ ‘Let’s Go Crazy’ and ‘When Doves Cry’ are memorably captured” –Radio Times