As a child Richard "Dick" Grayson was a member of Haley's Circus. He and his parents John and Mary Grayson were a team of acrobats called the Flying Graysons. When the circus traveled to Gotham City, Mr. Haley the owner of the circus was visited by a gangster called Tony Zucco. When Mr. Haley refused to pay Zucco protection money Zucco threatened Mr. Haley. Later that night Zucco returned to the circus and sabatoged the flying trapeze act which the Flying Graysons were preforming. John and Mary fell to their death while their son Dick watched. Soon after the police arrived and Bruce Wayne who was in the audience was there as well. Knowing that Zucco could try and kill Dick, Commissioner Gordon allowed Dick to stay with Bruce Wayne. As the weeks went by Batman and Dick hunted for Zucco. After Batman saved Dick from being killed by Zucco he brought Dick to the Batcave and he learned that Bruce Wayne was Batman.
As Robin When Dick discovered that Batman and Bruce Wayne were the same person Bruce began to train him. When Dick became a teenager he joined Batman as Robin. The two of them fought side by side for several years fighting several villians. When Tony Zucco reappeared in Gotham, Batman told Dick to stay away from him. This made Robin angery and he ignored what Batman told him and hunted Zucco anyways. When Robin finally cought up to Zucco he almost killed him. Robin mentioned to Batman the he had no idea how he felt and then remembered what happened to Thomas and Martha Wayne. On another occasion Robin was exposed to Scarecrow's Fear Gas and had to overcome he own fears to help Batman stop him. Falling Out With Batman While trying to stop the Joker latest scheme Batman and Robin track one of Jokers henchmen named Conor to his house. Batman interrogates the man in front of his wife and son and Robin begs batman not to do this in front of them. Batman ignores Robin and the Boy Wonder becomes so upset he quites being Robin and for years held a grudge against Batman. As Nightwing After his falling out with Batman, Dick moved to Bludhaven and took the name Nightwing. They would occasionally run into each other while fighting crime but it wasn't until the new Robin, Tim Drake met Dick that he realized Bruce was not a bad guy. Nightwing learned that Bruce had given Conor a job at Wayne Enterprises as a security guard. Soon after Nightwing forgives Bruce and rejoins his team. Now Dick Grayson was part of the new Bat Family which included himself, Batman, Robin and Batgirl.