Bruce invites Chase (who is obsessed with Batman) to a circus. Two-Face hijacks the event and threatens to detonate a bomb unless Batman surrenders himself. Acrobat Dick Grayson, the youngest member of the Flying Graysons, manages to throw the bomb into the river, but Two-Face kills his family. Bruce persuades the orphaned Dick to live at Wayne Manor as his ward, and Dick discovers Bruce is Batman. Taking the Batmobile for a joyride, Batman saves Dick from thugs; determined to avenge his family, Dick demands to join Batman in crime-fighting and kill Two-Face, but Bruce refuses.