It explains why the original team disbanded and why Dick Grayson carries so much guilt regarding Slade Wilson. Titans recap: Season 2, Episode 8 - Entertainment Weekly

This episode is a flashback that reveals the tragic history of the original Titans and their relationship with Jericho , Deathstroke’s son.

In this episode, the character Terra returns to the team, claiming she has gained better control over her earth-manipulating powers.