The New Teen Titans, Vol. 1 #20A (1982)

Dear Mom And Dad
Kid Flash writes a letter to his parents, apprising them of recent events involving himself and the other Teen Titans: a new super-villain calling himself the Disruptor attacks Cyborg and Changeling in the New York sewers; the Titans throw a surprise birthday party for Cyborg; and Kid Flash himself is captured by the Disruptor and his father, an old foe of Batman’s known as “Brains” Beldon. The Titans counterattack, only, to have the Disruptor turn their own powers against them, until he is defeated by Raven’s soul-self.
Release Date: 1982