John Byrum: John Byrum. Writer: Inserts. John Williams Byrum was born and raised in Winnetka, Illinois. While attending NYU Film School, he worked as an intern for Jim Henson and the Muppets, eventually working as a writer on the new Sesame Street (1969) show. Byrum moved to Los Angeles to pursue film work after writing several screenplays, including Inserts (1975). On the basis of that writing sample, he worked with producers Tony...
