The Brain

"Brian ? Who's Brian ?"

- The Brain to Beast Boy in Brian

The Brain is a main enemy of the Teen Titans and the arch enemy of Beast Boy. He makes his debut in Brian.

Bio
The Titans were locked up in a cell with electric bars and The Brain arrives to check on them. Robin was confident that they will escape anyhow since Brain took away their powers for his secret project in development. When Beast Boy yells at him as Brian, the Brain corrects him and leaves. Robin decides to organize another escape plan which involves Beast Boy, but eventually it fails as Starfire mentions that every time they are trying to escape, they get tortured by electricity.

Back at the Tower, during the party, when Super Robin sees the distress signal, he figures that the Titans were captured and orders the other buddies to go in action. The Little Buddies arrive at the Brain's HQ building on the roof where Super Robin tries to fight against Monsieur Mallah but fails and the rest of the buddies get captured as well. On the other hand, the Titans are used to living in their cell except for Robin who tries to reach for the cell's command panel and without any knowledge of what's inside of it, his arm gets crushed resulting him to scream in pain, getting the Brain's attention and tortures the Titans again. The Little Buddies finally team up and defeat Mallah, as they reached the main laboratory after fighting off the security guards. The Titans are still waiting for a miracle to escape while Robin is digging for a tunnel with a spoon. Eventually, the Little Buddies arrive to rescue them but their moment is interrupted by the Brain whom his project B.R.I.A.N is complete by placing his head in a giant robot filled with Titans' powers. Beast Boy now corrects his misspelling for being called Brian and not B.R.A.I.N.

The Little Buddies are fighting against him but they all get defeated except for Birdarang who transforms himself into a enhanced fighter after Beat Box tried to defend him but got hit. While fighting, he finally throws his head as a boomerang, breaks through the Brain's power cells and kicks his head out of the robot which causes the robot to fall. All the powers are free and return back to its own Titan which eventually they escaped at last. As they reach for their fellow Beat Box laid down on the floor, Cyborg places some new batteries which it turns on again with music this time. The Titans and Little Buddies are celebrating their victory, except for Robin who was left behind in the cell still digging with his spoon.

Power and Abilities
Being limited to only having a brain, The Brain is not a threat physically, but mentally he is a very formidable opponent.
 * Super Intelligence: The Brain is arguably one of the smartest characters in the series, being able to be the first villain to successfully capture the Teen Titans off screen by unknown means.
 * Master Technician: He is able to organize and use his strategic plans very well.
 * Leadership: He is the head of The Brotherhood of Evil.
 * PROJECT B.R.I.A.N: Is a super invention of The Brain that uses machinery along with all the powers of the Teen Titans outside of Robin. With The Brain's intellect and the brawn of the robot, The Brain becomes an even bigger threat, easily being able to handle all of "The Little Buddies" until Birdarang's transformation.

Appearances
Season 2 Comics
 * Brian (debut)
 * Idol Hands (debut)
 * Starstruck (cameo)

Trivia

 * The Brain was the main antagonist of the original series' final season.
 * The Brain was voiced by Glenn Shadix in the original series who passed away in 2010.
 * The Brain is the leader of The Brotherhood of Evil.
 * The Brain is also the first member of The Brotherhood to appear in a  Teen Titans Go! episode. Although appearing in the same episode, Monsieur Mallah came second in appearance.
 * He is the nineteenth villain from the original series to return.
 * He was a villain in "Batman The Brave and the Bold" and Young Justice.
 * His first form's body resembles that of a Dalek from the TV show Doctor Who.
 * His voice sounds a bit like Red Tornado from "Batman the Brave and the Bold".

Gallery
The gallery for The Brain can be viewed here.