William Leicester worked in a variety of genres and built up a diverse and reputable career. Leicester's career began with a role in the Cornel Wilde action movie "Operation Secret" (1952). In the fifties and the sixties, Leicester worked on "Beyond a Reasonable Doubt" (1956) starring Dana Andrews. Toward the end of his career, Leicester wrote "The Last Man on Earth" (1964). William Leicester passed away in January 1969 at the age of 54.