Publication history of Dick Grayson leadership of the Titans to Wonder Girl, and takes a leave of absence from the team. In pre-"Crisis on Infinite Earths" continuity, the maturing Dick Grayson grows weary of his role as Batman's young sidekick. He renames himself Nightwing, recalling his adventure in the Kryptonian city of Kandor, where he and Batman meet the local hero of the same name. "Nightwing: Secret Files & Origins" #1 and "Nightwing: Year One" tell the full post-Crisis version of how Dick Grayson gives up his identity as Robin (having been "fired" by Batman). Uncertain what to do with his new-found independence, Dick considers
Robin in other media (voiced by Jeremy Sisto), an assassin for the Court, is ordered to kill him when the leader discovers his secret identity. After Talon massacres the entire court, he and Robin clash in the Batcave before Talon commits suicide. Afterwards, Damian leaves for a monastery in the Himalayas. Damian returns in "", teaming up with Dick Grayson to investigate his father's disappearance. The Heretic (voiced by Travis Willingham), makes his first film appearance, as an artificially-aged clone of Damian like in the comics. Heretic attempts to absorb Damian's mind into his so he will know what it feels like to be