Your brain is different from a computer or any other electronic device. You cannot upload movies, shows or books in your head. Whatever you find out and learn mixes with the information you previously stored in your head. You may not even detect a single thread that would be clear enough. However, it does exist. Do not expect your memories to be perfectly clear and clean. New information will always be woven in the old one.
Major Reasons Why You Do Not Remember the Books You Read
How is it that we read books and watch movies and then forget them? You need to reread the stuff if you want to refresh the names and events.