The cancellation of Grayson and Van Helsing's demonstration leads Van Helsing to seek revenge; Harker forbids Mina from seeing Grayson; Lord Davenport's men attack Mina; Lady Jane learns Dracula is in London.

A public demonstration of Grayson's technology has terrible consequences; Lucy joins the undead; Van Helsing's revenge against Mr. Browning and Lady Jane leads to a confrontation with Grayson; Mina discovers the secret of Grayson's love.