S4, E117: The Roots: When Mom sees Darwin gazing longingly at a fish-tank, she thinks their mammalian lifestyle isn't fulfilling her adopted son and deep down he longs to connect with his fishy roots. So the family try to reconnect him with his aquatic culture. They try fish-food, fish-language and even fish clothes. But when none of it works, they realize they may have to let him go. / The Blame: Gumball gives Billy his first taste of videogames but the sheer excitement causes him to pass out. His mother Felicity summons the PTA and threatens to ban video games all across Elmore. Gumball and Darwin are given three chances to prove that videogames can be a force for good. But when they fail, they decide to prove books can be just as dangerous.