Nightwing

Dick Grayson was the identity of the first Robin, and later took the identity of Nightwing.

Biography
Dick is a former member of the Flying Graysons acrobatic family in Haley's Circus. Dick and his parents performed nightly with their death defying high wire acts. When the circus came to Gotham City, the gangster, Tony Zucco tried to extort protection money out of the owner, but he refused to cooperate. In retaliation, Zucco sabotaged their high-wire trapeze act, staging an "accident" that ended in the death of Dick's parents. Bruce Wayne, who helped to get the circus to town, was in the audience and witnessed these events unfold. Wayne arranged with Commissioner Gordon of the Police Department to become the young boy's legal guardian. However, in the rather large and empty Wayne Manor, Dick became more and more detached. Alfred Pennyworth brought this to Wayne's attention, who was in his fledgling years as Batman, and had little time to spend with Dick. Eventually, Dick went out on his own and tracked down Zucco but was caught. Batman saved Dick and took him back to the Batcave, where he revealed his secret to Dick.

Batman: The Adventure Continues

 * All Grown Up (first apperance)
 * Cat and Bird
 * Girls Night Out
 * Tiny Titans
 * Knightfall
 * Arkham City

Teen Titans: The Animated Series

 * Nightwing and Friends
 * Robin the Terminator
 * Titans Forever
 * Speedy's Out
 * Deathstroke V.S. Nightwing
 * Knight Time
 * Big Leagues

Justice League Heroes

 * The Terminator
 * Why So Serious?
 * Return to Gotham (cameo)
 * Titans
 * Young Justice
 * Final Countdown, Part One
 * Final Countdown, Part Two

Batman Beyond Unlimited

 * Robin Beyond, Part One (mentioned only)
 * Robin Beyond, Part Two
 * Legacy
 * Calling All Villains

Movies

 * Batman Beyond Unlimited: Return of Hush (final apperance)