Season 1, Episode 13. After Being Blackmailed by Slade to Become his Apprentice, Robin is Forced to become the Enemy of his own Team: The Titans. When Robin Hesitates to Blast Starfire, Slade Activates the Probes in The Titans' Bloodstreams. After he Escapes back to Slade, Robin is Traced to Slade's Hideout by The Titans. When Robin tries to Destroy the Probes Machine, He Accidently Infects Himself. The Titans Reunite and Fight Slade.