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Season 1 Episode
- Season 1 Birth of Astro Boy
- Season 1 Colosso
- Season 1 Expedition to Mars
- Season 1 One Million Mammoth Snails
- Season 1 The Sphinx
- Season 1 Zero, the Invisible Robot
- Season 1 Captain Atom
- Season 1 The Spirit Machine
- Season 1 The Deep Freeze
- Season 1 Strange Voyage
- Season 1 Time Machine
- Season 1 Cross Island
- Season 1 The Eyes of Christ
- Season 1 The Artificial Sun
- Season 1 Grass Boy
- Season 1 Silver Comet
- Season 1 Hullabaloo Land
- Season 1 Gangor the Monster
- Season 1 The Cosmic Giant
- Season 1 Toxor, the Mist Man
- Season 1 Satellite R-45
- Season 1 Sea Serpent Isle
- Season 1 The Deadly Flies
- Season 1 Kingdom of the Sea
- Season 1 The Deep-Underground Tank
- Season 1 Don Tay's Infernal Machine
- Season 1 Pearl People
- Season 1 The Wacky Machine
- Season 1 Memory Day
- Season 1 Secret Agent 3-Z
- Season 1 Mysterious Cosmic Rays
- Season 1 Hot Dog Corps
- Season 1 The Three Magicians
- Season 1 Beast From 20,000 Fathoms
- Season 1 Planet X
- Season 1 The Elixir of Life
- Season 1 The Strange Birthday Present
- Season 1 The Disturbed Small Planet
- Season 1 The Mysterious Cat
- Season 1 The Abominable Snowman
- Season 1 Deadline to Danger
- Season 1 The Yellow Horse
- Season 1 Ditto
- Season 1 Cleopatra's Heart
- Season 1 Return of Cleopatra
- Season 1 The Phantom Space Ship
- Season 1 The Gigantic Space Crab
- Season 1 The Great Space Horse
- Season 1 3D Tee Vee
- Season 1 Westward, Ha!
- Season 1 Jimbo the Great
- Season 1 Snow Lion
- Season 1 Goodbye 1963
- Season 1 Duel on the Alps
- Season 1 Rejuvenating Gas
- Season 1 The Moon Monsters
- Season 1 Astro Boy goes to School
- Season 1 The Island of Mystery
- Season 1 The Super Duper Robot
- Season 1 Dogma Palace
- Season 1 Space Parasites
- Season 1 The Haunted Ship
- Season 1 The Man-Made Iceberg
- Season 1 Vampire Vale
- Season 1 The Terrible Tidal Wave
- Season 1 Vikings
- Season 1 The Devil Doll
- Season 1 Dinosaur Dilemma
- Season 1 The Clock Tower Mystery
- Season 1 The Flower Monster
- Season 1 Attack From Space
- Season 1 Shipwreck in Space
- Season 1 Big Titan
- Season 1 Mission to the Middle of the World
- Season 1 Inca Gold Fever
- Season 1 The Monster Machine
- Season 1 The Hooligan Whodunit
- Season 1 Funnel to The Future
- Season 1 Super Brain
- Season 1 Mighty Minute
- Season 1 Dream Machine
- Season 1 The Robot Olympics
- Season 1 Dunder, Bird of Doom
- Season 1 Dolphins in Distress
- Season 1 The Mad Beltway
- Season 1 The Terrible Time Gun
- Season 1 Space Princess
- Season 1 Mighty Microbe Army
- Season 1 Horrible King Horrid
- Season 1 Mystery of the Amless Dam
- Season 1 Galeom From Galaxy G
- Season 1 The Three Robotiers
- Season 1 Brother Jetto
- Season 1 Angel of the Alps
- Season 1 Magic Punch Card
- Season 1 The Great Rocket Robbery
- Season 1 Contest in Space
- Season 1 Gift of Zeo
- Season 1 A Deep Deep Secret
- Season 1 The Wonderful Christmas Present
- Season 1 Uncharted World
- Season 1 Jungle Mystery
- Season 1 The Terrible Spaceman
- Season 1 The Devil’s Balloon
- Season 1 General Astro
- Season 1 The Mighty Mite From Ursa Minor
- Season 1 Mystery of the Metal Men
- Season 1 Super Human Beings
- Season 1 Phoenix Bird
- Season 1 Menace from Mercury
- Season 1 Robot Polymer
- Season 1 Samson’s Hair
- Season 1 Dangerous Mission
- Season 1 Metro Monster
- Season 1 The Big Runaway Safe
- Season 1 The Greatest Robot on Earth (part one)
- Season 1 The Greatest Robot on Earth (part two)
- Season 1 Robot Grabby
- Season 1 Planet 13
- Season 1 Time Hunter
- Season 1 Prisoners in Space
- Season 1 The Monster Mantler
- Season 1 Captain Dog
- Season 1 Double trouble
- Season 1 Find the Bacteria
- Season 1 Roboids
- Season 1 The Experimental Robot
- Season 1 Treasures of the Inca Empire
- Season 1 Atom vs. Atom
- Season 1 The Storm on Mars
- Season 1 The Moon Champion
- Season 1 Prince Louis
- Season 1 Revenge After Ten Years
- Season 1 Operation Escape
- Season 1 The Robot-Dog Backy
- Season 1 Inspector Jaguar
- Season 1 Little Cooley
- Season 1 1 Long Day
- Season 1 Atom Stolen
- Season 1 The King and Atom
- Season 1 The Locomotive March
- Season 1 Minya’s Star
- Season 1 Bird Street Story
- Season 1 Lost Friendship
- Season 1 Atom in the Deep Sea
- Season 1 Report from the Future
- Season 1 Mid-air Screen
- Season 1 Robio and Robiet
- Season 1 The Can Capriccio
- Season 1 Miss Magnet
- Season 1 Lonely Atom
- Season 1 The Robot Bombs
- Season 1 The Red Merry-Go-Round
- Season 1 Blue Bird Story
- Season 1 The Crazed Boundary
- Season 1 Robot Mayor
- Season 1 Gypsy’s Star
- Season 1 Funny Companion
- Season 1 Devil and Angel
- Season 1 The Golden Flute
- Season 1 Dream-Selling Aliens
- Season 1 Operation Candy
- Season 1 Road to Another World
- Season 1 The Space Spider
- Season 1 A Great Fuss Over Babies
- Season 1 The Jewel-Eating Monster
- Season 1 Plenty of Balloons
- Season 1 The Island That Jumped Up
- Season 1 Gift from the Future
- Season 1 Two Princesses
- Season 1 Kutcher Forever
- Season 1 The Herald Brothers
- Season 1 Robotty
- Season 1 The Great Submarine Canal
- Season 1 Robot Wars (part one)
- Season 1 Robot Wars (part two)
- Season 1 The Gigantic Robot
- Season 1 Chi-tan’s Nighttime Adventure
- Season 1 Blue Horseman (part one)
- Season 1 Blue Horseman (part two)
- Season 1 Ghost Manufacturing Machine
- Season 1 Demented Cobalt
- Season 1 Japanese People from Space
- Season 1 Time War
- Season 1 Star of Africa
- Season 1 Monsters Come out at Night
- Season 1 Baily’s Legend
- Season 1 Tengu of Kurama
- Season 1 Confusion at the Shooting Studio
- Season 1 Miracle of Mesopotamia
- Season 1 Wandering Roppi
- Season 1 Medusa’s Mansion
- Season 1 The Greatest Adventure on Earth
Astro Boy - Season 1 Episode 74 Mission to the Middle of the World
7.10 30 minutes It is thought that a highly advanced civilization might exist underground. To test this hypothesis, Astro and Uran set out on an underground expedition. There they get attacked by underground men.
