When a mysterious alien probe comes to haul Starfire away, sweet-natured Star has no idea why it came. And when Starfire's sister Blackfire stops by to visit, Starfire just wishes she would leave. Blackfire's wild, cool, and hip-- everything Starfire's not. The other Titans seem to like Blackfire so much, Starfire thinks they won't need her around anymore.

While playing in the park Cyborg suddenly shuts down. After rebooting he tells the other Titans that his batteries are dying. During a battle with Mumbo, Cyborg's emergency batteries die and he is lost. The Titans believe Mumbo to have kidnapped him, but he has instead been found by a strange man called Fixit.

A mysterious new villain called Trident appears and starts stealing nuclear waste from ships. The Titans go to investigate and meet a new hero, Aqualad. This new hero causes Beast Boy to become very competitive.

Cyborg has finally finished his 'baby', the T-Car. But after a battle with Overload his car disappears. It successively ends up in the hands of two bad guys called Cash and Sammy, then Gizmo, and finally Overload, the last of which forces Cyborg to make a painful decision.

Starfire is trying to commemorate the Tamaranean holiday Blorthog, the festival of friendship, when Warp, a villain from the future, comes back in time to steal an antique. When Starfire charges at him, she finds herself stranded in the future and finds that much has changed for her friends ... and only for the worse.

When Cyborg beats a robot named Atlas in an online video game, he challenges Cyborg to a real, physical fight; a fight Cyborg loses due to Atlas having lesser limits on his strength. Atlas then kidnaps Robin, Starfire, Raven, and Beast Boy as his prize and challenges Cyborg to a rematch where his friends’ lives are at stake.

Starfire wakes up one day to discover a huge lump on her forehead. But this is only the start of a bizarre string of transformations affecting her - changes that interest a highly hostile creature very much.

Terra and Beast Boy are finally kicking up a notch when they go out on a date. But while they were out, someone let Slade's army into Titans Tower. But when Beast Boy and Terra just about kiss, Slade ruins the romance. Slade lets out the news that Terra is his apprentice, making for a very unhappy Beast Boy. Finally, he turns his back on Terra, letting her go with Slade.

Terra finds out that the Titans are not easily destroyed, when they come back and nearly defeat her. Slade sends Ternion (a combination of Overload, Plasmus, and Cinderblock) while he beats Terra up for running away. When the Titans see how sorry Terra is and the torture Slade is doing to her, will they forgive her? Or will they follow out with their plans and destroy her?

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.

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.

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.

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.

Cyborg is mysteriously thrown into the distant past and lands in the middle of a barbarian village that needs his help. But with the nearest charging station 5,000 years in the future, Cy has no way to recharge, and his power supply is dwindling.

Beast Boy has only one real dream in life -- to someday, somehow own a Moped. And when Robin won't buy him one and Cyborg won't build him one, Beast Boy has only one way to make his dream come true he has to get a job. However, when he goes to work at a new restaurant called ""Mega Meaty Meat"" for a strange man named Bob, he soon realizes all is not what it seems.

An exciting battle on a distant space station ends with a tremendous explosion that blows the T-Ship apart -- and sends the Titans flying off in five different directions to crashland on a strange alien world.

The day has finally come. Raven is destined to end the world on this day. Trigon will come by sunset. But not if the Titans have anything to say about it. They place Raven in a safe room while they take on an army of flame creatures and Slade who is determind to take Raven to the Trigon. But Raven knows the horrible truth. No matter what the Titans do, there is no escaping her destiny.