The Flying Graysons were the parents of Dick Grayson later known as Robin. Their names were Mary and John Grayson. They were a family of circus acrobats. While preparing for a performance, Dick overhears two gangsters attempting to extort protection money from the circus owner. The owner refuses, so the gangsters sabotage the trapeze wires with acid. During the next performance, the trapeze from which Dick's parents are swinging snaps, sending them to their deaths. Before he can go to the police, Batman appears to him and warns him that the two gangsters work for Tony Zucco, a very powerful crime boss, and that revealing his knowledge could lead to his death. When Batman recounts the murder of his own parents, Dick asks to become his aide. After extensive training, Dick becomes Robin. They start by disrupting Zucco's gambling and extortion rackets. They then successfully bait the riled Zucco into visiting a construction site, where they capture him. At some point, Robin left his mentor's shadow and went to Jump City to be his own hero, only then to be leader of the Teen Titans.
However, Robin would not let go of his past forever, as seen in Teen Titans Go! #47. It was a sad day for Robin, as it was the anniversary of his parents' death, and he had been close to crying for the whole story. Batman narrates the story, stating what he and Robin had been through together, stating that they were a "family act". Each Titan tries to cheer Robin up—Cyborg does a workout routine, Beast Boy tells him jokes, and later pulls a prank, and finally, Raven offers emotional healing as she looks at Robin's tragic memory in the episode, "Haunted". Starfire later goes onto the pier, seeing Robin without his mask on, crying. She comforts him, allowing him to vent. Later he says that she helps him remember there's more to life than fighting crime. Unknown to Robin, Batman was watching from a distance. At the end of the story, they kiss, much to Batman's happiness, knowing that Robin has grown up, and he will be fine with Starfire.