1 Season
193 Episode
Astro Boy - Season 1 Episode 99 A Deep Deep Secret (1966)
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.
- Country : Japan
- Genre : Animation, Mystery, Sci-Fi & Fantasy, Kids
- Studio : Fuji TV
- Director : Osamu Tezuka
- Cast : Mari Shimizu, Kazue Tagami, Youko Mizugaki, Akihiko Mitsueda, Seizô Katô, Shingo Kanemoto
