Burr appeared in more than 50 feature films between 1946 and 1957, creating an array of villains that established him as an icon of film noir. Film historian Alain Silver concluded that Burr's most significant work in the genre is in ten films: "Desperate" (1947), "Sleep, My Love" (1948), "Raw Deal" (1948), "Pitfall" (1948), "Abandoned" (1949), "Red Light" (1950), "M" (1951), "His Kind of Woman" (1951), "The Blue Gardenia" (1953), and "Crime of Passion" (1957). Silver described Burr's private detective in "Pitfall" as "both reprehensible and pathetic", a characterization also cited by film historian Richard Schickel as a prototype of film noir, in contrast with the appealing television characters for which Burr later became famous. "He tried to make you see the psychosis below the surface, even when the parts weren't huge," said film historian James Ursini. "He was able to bring such complexity and different levels to those characters, and create sympathy for his characters even though they were doing reprehensible things."