Dick Grayson is a vigilante known as Nightwing, a founding member of the Titans, and a member of the Batman Family. His parents were the Flying Graysons, acrobats performing with him alongside in the traveling Haly's Circus. They were tragically murdered by a mobster in Gotham City named Tony Zucco, and the billionaire Bruce Wayne adopted Dick as his legal ward at a very young age. Grayson went through extensive training in martial arts and crimefighting to become the original Robin.