81. Deathstroke and Terra vs. the Teen Titans (The Judas Contract)
In the first issue of the New Teen Titans, a villain named the Ravager is given the assignment of killing the Titans. He fails, so the next issue, his father, Deathstroke the Terminator, takes the assignment. He, too, appears to fail.
Instead, after his initial failure, Deathstroke decided to place a sleeper agent within the Titans, in the form of the junior grade sociopath, Tara Markov, otherwise known as the superhero Terra!
The Titans eventually open their arms to Terra and she becomes a member.
The famous Judas Contract storyline by Marv Wolfman and George Perez details Terra’s betrayal of the Titans, as Deathstroke finally delivers on the contract his son took in the first issue, by delivering to the villainous H.I.V.E. organization the Titans (save Dick Grayson, who escapes).
Dick meets up with Deathstroke’s ex-wife, who has with her Deathstroke’s OTHER son, the heroic mutant known as Jericho. Dick teams up with them to rescue the Titans. In the process, Dick takes on a new superhero identity (he had just recently quit being Robin), becoming the new hero known as Nightwing.
Nightwing, Jericho and Deathstroke’s ex-wife help free the Titans from the deadly grasps of H.I.V.E. Eventually, Jericho saves the day by using his mutant ability, which allows him to possess other people’s bodies, and possesses his father and frees the Titans. Terra sees this and not being too bright, decides that Deathstroke has turned on her, so in one last sick move, she brings down the entire H.I.V.E. facility that they were at down to the ground, killing herself in the process (the Titans survive, though, natch).