Sherlock theme character: Irene Adler!

Irene Adler is an aristocratic woman of intrigue who leaves behind her a trail of broken hearts and empty wallets. Her latest blackmail target is a member of the royal family. Dr Black discovered the affair and threatened to reveal Adler’s true motives unless she used her royal connection for his ends. Perhaps he discovered, too late, that you should never blackmail a blackmailer?