Astro Boy is a sci-fi series set in a futuristic world where androids co-exist with humans. Its focus is on the adventures of the titular "Astro Boy" (or simply "Astro"), a powerful robot created by the head of the Ministry of Science Doctor Tenma (dubbed Dr. Boynton in the first series English anime and Professor Balfus in the Canadian dub of the second series) to replace his son Tobio (or Astor Boyton III in the first series English anime, Toby in the remake of the first series English anime). After Tobio died in a car accident, Dr. Tenma built Astro in Tobio's image and treated him as lovingly as if he were the real Tobio, but soon realized that the little android could not fill the void of his lost son, especially since Astro couldn't grow or express human aesthetics (in one set of panels, Astro is shown preferring the mechanical shapes of cubes over the organic shapes of flowers). In the original 1960 edition, Tenma rejected Astro and sold him to a cruel circus owner, Hamegg (also called Caccitore), who abused the performers. In the 1980 edition, Astro naïvely signed himself away to the circus owner.