Stefan drives a stake through Radu 's heart and severs his head with a sword , killing Radu .
Stefan , having fallen in love with Michelle , helps her try and free Mara and Lillian from Radu 's control .
Stefan drives a stake through Radu 's heart and severs Radu 's head with a sword , Radu Radu .
Stefan , having fallen in love with Michelle , helps her try and free Mara and Lillian from Radu 's control .