When H.I.V.E. shows up causing havoc, the Titans get straight to the job. Unfortunately they escape, but Robin was able to plant a locator device onto Jinx just in time. The Titans send Cyborg - disguised as a strong man known as ""Stone"" - to infilitrate the H.I.V.E. academy and find out what they're up to.
There's a new thief in town - Robin's former evil alter ego, Red X. Robin feels that this is all his fault, and must stop X from getting a dangerous powerful chemical known as synovium that will power him up. Robin stops at nothing to catch his former evil alter ego - but it turns out that there may be a even bigger villianious plot in the mists.
The Grand Ruler of Tamaran has arranged for Starfire to be married during the Teen Titans' visit to Tamaran. Robin has a hard time believing that Starfire is to marry someone she hasn't met or known.
When Beast Boy mistakes Cyborg's system recharger for a video game, he accidentally infects it with a nasty computer virus. The virus quickly spreads to Cyborg himself causing the half-teen/half-machine to go haywire, and the only way to stop the virus is to shrink down to microscopic size and go on a fantastic voyage inside Cyborg. Does Amoeba Beast Boy have the brains to fix Cyborg's brains before a crazed Cyborg destroys the city?
Ever since the Titans' final confrontation with Slade, Robin has been haunted by one question: Is Slade really gone? And after Cinderblock escapes from jail, Robin finally gets his answer when he sees Slade. Robin pursues Slade, fiercely determined to stop his nemesis once and for all.
Raven has always been lonely at the Tower, despite the other Titans. But that all changes when Raven discovers a young magician trapped inside one of her books.
The Titans' Fourth of July festivities are interrupted when Mad Mod comes to the party uninvited, declaring the American Revolution a hoax and reclaiming the city for jolly old England. To make matters worse, old Mad Mod steals Robin's youth. Can the remaining Teen Titans devise a plan to take back their city and save their leader?
Brother Blood is back, and this time, it's personal. Cyborg learns that Blood stole his blueprints--and the villain is using Cyborg's technology to create a doomsday device. Can Cyborg take charge of the team and lead a mission to stop his archenemy?
When Beast Boy begins turning into an angry, aggressive Man Beast against his will, the Titans must try to save themselves from their savage friend.
Starfire adopts a weird mutant silkworm named Silkie as a pet, but when she feeds him some alien food from Tamaran, Silkie has an unexpected--and monstrous--growth spurt. Can Starfire still keep her beloved worm?
The Amazing Mumbo is up to his old tricks. When the Teen Titans try to stop the madcap magician in mid-performance, Mumbo pulls a fast one. With a wave of his wand, he sucks the Titans into his hat where our heroes discover a strange magical world of weirdness.
Cyborg has a final showdown with Brother Blood, and a new branch of the Titans team is created. Titans East is a different tower in a new city with five new members: Aqualad, Bumblebee, Speedy and a pair of high-speed twins known as Mas Y Menos. Part one of a two-part episode.
The final battle continues between Cyborg and Brother Blood as well as the creation of a new branch of Titans.
