Maggie's Brain is the tenth Simpsons short which originally aired on The Tracey Ullman Show on October 11, 1987.
Bart and Lisa wonder what Maggie is thinking while she is lying in her crib. However, Maggie sees her siblings as negative figures, attempting to attack her. Then, while babbling to her, Maggie shoves a bottle in Bart's mouth. Bart and Lisa wonder what the hopes and dreams of a tiny infant inside a crib actually are, and imagine Maggie doing the same to them as they are doing to her.