|Debut||My Better Half|
Baby Genius is a baby who the agents call on to help them solve complex problems. Baby himself can't speak, so his Russian nanny Rivka interprets for him. According to Rivka in the episode Jinx, Baby Genius is a villain because "Villains don't tattletale on other villains". This is in reference to the strict No Tattletale Code that all villains in the show follow.
It's common for agents to present the baby with gifts to bribe him to help them. The child can be picky however and doesn't always accept their offerings. Sometimes he can be swayed by uncommon methods such as jokes or agents pretending to fall down.
Baby and Rivka always make sudden and unexpected entrances and exits. The pair always seem to appear and disappear without warning, though occasionally they announce their presence in advance with a distant laugh or by knocking something over.
Incredible knowledge and incredible stealth for sneaking up on others.
- In almost every episode, Rivka's name is spelled "Rivka" in the credits. But in the credits of The Perfect Score, her name is spelled as "Rivkah".