Astro Boy - Season 1 Episode 99 A Deep Deep Secret
Colon-bu-bu, the explorer of the underground state of Chombo, heads for the ground hoping to see a new world. Then he meets Cobalt and takes him underground as prisoner.
- Genre: Animation, Mystery, Sci-Fi & Fantasy, Kids
- Studio: Fuji TV
- Keyword: android, mecha, black and white, based on manga, robot, anime, osamu tezuka, astro boy
- Cast: Mari Shimizu, Kazue Tagami, Youko Mizugaki, Akihiko Mitsueda, Seizô Katô, Shingo Kanemoto