Knowledge

Knowledge is Teen Titans Go! Season 2, Episode 5a (31a), and the 61st overall episode in the series.

Summary
Starfire is tired of not fitting in with the other Titans, and asks Raven to help her to learn more about human culture. Raven casts a spell to give Starfire all of human knowledge, which turns Starfire into a total bummer.

Plot
The episode starts on the roof of the Tower where Robin is checking on the weather and warns the Titans that its in perfect condition for a beach day. When Starfire started to yawn the Titans gasps as they consider it contagious that may cause sleeping. Robin sealed Starfire from preventing anyone to yawn but not for too long until all the Titans started to yawn as well and they fall asleep the entire day. They woke up at night, as Starfire apologies for ruining their day but the Titans were alright with her as the way she is but she admits that it isn't the first time her ignorance of Earth culture has ruined the merriment and she would not wish to be a bummer either.

Later that night, Raven goes by and hears Starfire crying in her room, she enters to see what happened but Starfire was crying because of a missunderstanding where she had to set up Beast Boy on a blind date requested by him. Instead she burned Beast Boy's eyes leading him to not see and breaks out through the window. Still apologizing, she continues to cry. Raven offers her some help with knowledge lessons by explaining to her about it while singing and dancing but that didn't helped much as another attempt lesson was to give Starfire a magic necklace relic that will make her smarter over the night.

In the next morning, Robin checked again the weather's condition for a perfect lake day, until Starfire interferes that not only its for fun activities but that would lead to polution as well. Robin started to worry about her and suspects Raven for helping her but Starfire claimed that she prefers to be like this only for Robin to accuse her for ruining the day again. Starfire starts to mocking the knowledge about Raven's activities while the other Titans were yelling "BUMMER!" In the end, Raven finally realizes that it was her fault for helping her thinking it was an improvement but when Starfire arrive, her brain has grown up huge leading to Titans to get terrified. Raven claimed that she used dark magic to give her all human knowledge but it was expanding too rapidly and the only way to get rid of her knowledge is by entering in her head and destroying it before her head explodes.

For that, she summons a ship for the Titans which they've been shrinked and entered through Starfire's ear. No matter how they tried to nuke down some neurons while traveling in Starfire's head, it ussualy failed and they had no choice but to go for the source located in the brain. When they reached it, they had to fight with Starfire's Source of knowledge and defeats it by ignorance with a laser blast in the end while it was still weak. After they got out of Starfire's head, her brain resized back to its original shape and her normal alien thinking as her magic relic broke into pieces. Raven apologizes to Starfire that she shouldn't use dark powers from the first time, for she could've had teached her in the old fashion way with any types of information until the other Titans yelled at Raven for being a bummer again.

Characters

 * Robin
 * Starfire
 * Raven
 * Beast Boy
 * Cyborg
 * Demon (cameo)
 * Starfire's Source (debut)

Song

 * "Mean What'cha Say"

Trivia

 * This is the first Season 2 episode to feature Raven's little buddy, the Demon.
 * According to "Brain Food", Cyborg, Raven, Robin, and Starfire's brains were all equal, proving this episode is inconsistent with that one.
 * This is the first time that Raven was seen in a bathing suit.

Continuity

 * This is the fourth time Raven has been shown singing.
 * This is the tenth time that Raven was unhooded.
 * This was also the first time she was seen unhooded in chibi form while she was in a bathing suit.
 * Raven's love for Pretty Pretty Pegasus was shown again.
 * This is the fifth time that Raven is seen playing with the Pretty Pretty Pegasus dolls. ("Legendary Sandwich", "Meatball Party", "Nose Mouth", "Be Mine")
 * Music from "La Larva de Amor" is heard in the montage where Starfire tells the Titans facts.
 * When the Titans come in and out of Starfire's ear, there is a hole seen in her lobule. This could be a reference to Starfire wearing the green star earings for her date with Speedy in "The Date".
 * The forest Raven was playing with her dolls in was the same one where most of the episode took place in "Nature".

Errors

 * Starfire was actually wrong when she said that 46% of lakes was polluted, while its really 47%.