Divide and Conquer:
Cyborg quits the Teen Titans after getting into an argument with Robin, and allowing Cinderblock to escape. Cinderblock returns to his mysterious boss Slade with his prize: a sleeping inmate who becomes the monstrous Plasmus whenever he is awakened.
Sisters
Starfire's sister, Blackfire, seems to click with all the Titans better than she does but possesses a secret of which they are unaware. Deciding that her sister fits better with the group than she does, Starfire decides to quit the Teen Titans.
Final Exam
Gizmo, Mammoth and Jinx - members of Hive Academy - try to make an impression on Slade by taking out the Titans. This forces the Titans to learn how to work together in order to be victorious.
Forces of Nature
Dark clouds blow in, bringing Thunder and Lightning, two stormy brothers looking for a good time. Unfortunately their idea of fun is wrecking everything in sight. Meanwhile after one of Beast Boy's practical jokes misfires, Beast Boy learns his lesson.
Sum of his Parts
Cyborg is reminded he's not completely human, when his power cell dies during a wild junkyard battle with the Amazing Mumbo. The Titans fear Mumbo has taken their friend, and search the city for Cyborg. But Fixit, a cybernetic hermit who finds and repairs broken things, finds Cyborg.
Nevermore
Raven's creepy tantrum of crackling black energy leaves Dr. Light begging for mercy, and the Titans see a new side of Raven- her temper. But, when Cyborg and Beast Boy find a Mysterious Mirror in Raven's room, they're suddenly transported to a strange nightmare world that's somehow connected to Raven.
Switched
Starfire and Raven don't really "get each other." Star doesn't understand Raven's repression, and Raven can't deal with Starfire's emotional outbursts. But when The Puppet King imprisons Robin, Cyborg, and Beast Boy inside wooden puppets and takes control of the boys' bodies. The girls are going to have to understand each other -- if they want to survive.
Deep Six
When a mysterious amphibious villain called Trident makes off with a boatload of dangerous Toxic Waste, the Titans hop into the T-SUB and go on an undersea adventure to put a stop to Trident. This is Beast Boy's big chance to morph into all sorts of undersea animals and show the team what a big hero he really is. But unfortunately another big hero shows up to steal the spotlight: a good-looking water-breathing teenage do-gooder named Aqualad.
Masks
Slade sends a team of Robotic Commandos to steal a high-tech chip. Now Robin is more determined than ever to find out who Slade is -- and what he's planning. But while Robin is obsessively researching his arch-nemesis, a mysterious new bad guy called Red X tries to steal the same chip.
Mad Mod
The Titans awake to find themselves captured as prisoners of Mad Mod, a madcap bad guy in a psychedelic suit. Mad Mod has decided to teach the teens a lesson, creating a massive mind-bending school full of optical illusions and brain-washing hypno-screens. Will the Titans be "re-educated" and lose their minds in the process?
Car Trouble
Cyborg has just finished building the vehicle of his dreams: the super-cool, super-fast, ultra-high-tech T-Car. But before Cyborg can take it out for a spin, the Titans are called to an electronics superstore where Overload, an electrical menace, is wreaking havoc. But after the Titans capture Overload, Cyborg freaks because the T-Car is gone. A wild adventure unfolds as the T-Car changes hands from bad guy to worse guy.
Apprentice- Part One
Who is Slade? And what is he planning? The questions that have been keeping Robin awake at night are about to be answered. Slade contacts the Teen Titans and unveils his master plan: A Chronoton Detonator - - a sinister-looking high-tech device has the ability to stop time... forever. The Titans spring into action on a mad hunt to find the Detonator before it freeze-frames the entire city.
Apprentice- Part 2
With no signs of Robin since Slade's "Chronoton Detonator" turned out to be a fake, the four remaining Teen Titans search the city for their missing leader. But their search is cut short when the Titan signal alerts them to a new villain in town.
