Balding, quietly-spoken, of slight build and possessed of piercing blue eyes -- often peering out from behind round, steel-rimmed glasses -- Donald Pleasence had the necessary physical attributes which make a great screen villain. In the course of his lengthy career, he relished playing the obsessed, the paranoid and the purely evil. Even the Van Helsing-like psychiatrist Sam Loomis in the Halloween (1978) franchise seems only marginally more balanced than his prey. An actor of great intensity, Pleasence excelled on stage as Shakespearean villains. He was an unrelenting prosecutor in Jean Anouilh's "Poor Bitos" and made his theatrical reputation in the title role of the seedy, scheming tramp in Harold Pinter's "The Caretaker" (1960). On screen, he gave a perfectly plausible interpretation of the head of the SS, Heinrich Himmler, in The Eagle Has Landed (1976). He was a convincingly devious Thomas Cromwell in Henry VIII and His Six Wives (1972), disturbing in his portrayal of the crazed