User blog comment:Noctosphere/Who do you think should be the Big Bad of S12/@comment-31647781-20170527212522/@comment-27084975-20170528033259

As killroy said, Dr. Hess isn't a puppet, she is a British Men of Letter Elder, so one of the leader of the organisation. So far, she is the only leader we saw but of course, there are more of them. The one we heard on the radio was probably one of them, but we dont know his identity so far...