"Requiem for a Titan" First appearance of the Gargoyle (revealed later to be Bromwell Stick AKA Mister Twister).
*The Gargoyle, a former Teen Titans foe who claims he was unjustly imprisoned by the team, sows the seeds of doubt in the minds of all but Robin, enabling him to banish them to the dimension of Limbo by means of his mystic ring. Finally, Robin surrenders and allows himself to be transported to Limbo so that he can fight the Gargoyle and his thralls on their home ground. Smashing the Gargoyle's ring traps the villain in the extradimensional realm and restores Robin and his teammates to Earth and normalcy. *Source: Official Teen Titans Index #1 - Published by ICG