Ian cursed at Sadie's response, and he shut his entire building down in preparation for what he already knew was going to happen. They never figured out how Mina ransomed their system, and while everything had been replaced, Ian did not want to take the chance; something Sadie seemed to be very amused by. She kept mocking him as being 'afraid' of her sister, and Ian did his best to ignore her before she crossed a line that almost made him give the order to have her neck snapped. It was Mills who calmed him, but not because she said anything significant, she was struggling to hold back her laughter, and Ian realized that he was being baited.