From The Grindhouse Cinema Database
- In order to do research for her book, former LA Times reporter and screenwriter (under contract at Warner's)Virginia Kellogg pulled some strings to incarcerate herself in a woman's prison. She then wrote a book about it "Women without Men," which was a kind of almanac of everything she witnessed while in prison. Warner Bros. then had her write the screenplay which was nominated for an Oscar.
- In an early example of product placement, Snickers, Mason Mints, and Life-Savers are clearly visible when Harper opens the drawer in her room.
- Originally titled The Big Cage, an early version of the script was intended as a Bette Davis/Joan Crawford vehicle.
- Screen Director's Playhouse broadcast a 60 minute radio adaptation of the movie on August 2, 1951 with Eleanor Parker reprising her film role.