Invader Zim Episode 18 - Plague of Babies Episode Title:Plague of Babies.Episode Description:Zim fears that he has been seen out of disguise by a human baby. Believing the baby to be a threat to his mission, he attempts to interrogate it, only to discover that it is in fact an extraterrestrial monster that, along with others of its species, has been stranded on Earth since the destruction of its spacecraft years ago. The aliens attempt to steal Zim's ship, but by exposing them to a field that induces stupidity, generated by GIR, Zim is able to incapacitate them and pass them off as human infants once again.