RADA-trained Glenda Jackson was shaped by her work with the Royal Shakespeare Company which she joined in 1964 and specifically by director Peter Brook's experimental Theatre of Cruelty season that year and its Antoine Artaud-influenced improvisational games. She won acclaim for her chilling performance as an asylum inmate portraying Danton's murderer Charlotte Corday in the 1965 London and New York productions of "Marat/Sade", staged by Brook. And although she made a brief screen appearance as an extra in "This Sporting Life" (1963), her first significant film work was reprising the role of