 However, some episodes do feature a different set of enemies, such as the underground species of Imposters or Reptogators, the space alien Floaty Heads or Changed Daily's nanny as a child, who has world domination plans of her own.Many episodes feature a sealed orange cylinder, known only as "The Secret Thing".It is not known what the Secret Thing actually is, although in one episode Doctor Doctor steals it, however it is a fake, filled with confetti.