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At some point during circus practice, Mitch's line snapped and caused him to nearly plummet to his death, however, his younger brother, Dick, swooped down and caught him. His father, John, told Dick that he swooped in like a robin and thus gave Dick his nickname and later his superhero name, "Robin". Dick even had a robin emblazoned on his biker helmet.
Mitch was present at the Gotham City Charity Circus as the headliner act with his acrobatic family. When Two-Face and his Thugs arrived and crashed the party, the Flying Graysons tried to defuse his bomb that was placed on the roof. However, Two-Face shot a machine gun at the three (Dick was on the roof) and they all fell to their deaths.
- Mitch Grayson was played by Mitch Gaylord, who was the stunt double for Chris O'Donnell.
- Mitch was called with that name as a homage to the actor who portrayed him.
- In the Teen Titans episode "X", there was a scene where Beast Boy showed his ideas of Red X's possible identities and used an illustrated diagram, including a person who was labeled Long Lost Brother. Mitch was depicted as a "super-deformed" version of Robin, who was bald, had a pacifier in his mouth, and a bib. Since Teen Titans came nearly a decade after Batman Forever, it's likely a coincidence.