Handsome, slender, often mustachioed actor, who, after making his mark on the stage, made an auspicious film debut in the title role of "The Mask of Dimitrios" in 1944. Scott contributed a memorable turn as a sharecropper in Jean Renoir's finest American work, "The Southerner" (1945), and went on to play a variety of unctuous cads and scoundrels (with an occasional sympathetic variation) through the 1950s and early 60s. One of his best remembered performances was as the seductive, snaky socialite who marries the ultimate upwardly mobile mom, "Mildred Pierce" (1945). He was married to actress