1x99 - A Deep Deep Secret

December 19, 1964

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.

1x100 - The Wonderful Christmas Present

December 26, 1964

On Christmas night, Dr. Ochanomizu opens the will of his scientist friend who died 10 years before. It says that he has left an invention in Bururu Mountain. Astro and his friends happen to be on the mountain and encounter a boy called Akio who lives alone there.

1x101 - Uncharted World

January 2, 1965

The visiting Prince Dorian of the Camellia Kingdom disappears. Astro goes searching for him using the latest 4D detection device, and finds the prince wandering in another world. That world is inhabited by people who have been spirited away from various time periods.

1x102 - Jungle Mystery

January 9, 1965

Uran is going to be in a movie as Tarzan. When she goes on location to the jungle, however, a mysterious woman takes her away. The woman is planning to make Uran, who is dressed as a boy, the prince of the demon's place.

1x103 - The Terrible Spaceman

January 16, 1965

Humans are drawn toward a flight of stairs that suddenly appear one day, and they start to walk towards a spaceship hidden among the clouds. When there are no humans left on earth, the robots start to talk about taking over the planet.

1x104 - The Devil’s Balloon

January 23, 1965

1x105 - General Astro

January 30, 1965

Astro is shot by a gun that ruins artificial intelligence. He loses all his memory, and is shot away into space.

1x106 - The Mighty Mite From Ursa Minor

February 6, 1965

Hamegg sees a UFO in the woods that seems to have made an emergency landing, and finds an alien child. He notices the child's super strength, and plans to win the child's fame as a wrestler.

1x107 - Mystery of the Metal Men

February 13, 1965

Astro is involved in an explosion during the construction of a dam. The impact sends him into a parallel world where Tobio, the son of Dr. Tenma, never died in an accident. In other words, it is a world where Astro has not been born.

1x108 - Super Human Beings

February 20, 1965

Three scientists gain supernatural power on the surface of the moon. Then Dr. Arden, who has a grudge against Dr. Ochanomizu, stages an attack against him. In order to protect Dr. Ochanomizu, Astro fights fiercely against the scientists who have supernatural power.

1x109 - Phoenix Bird

February 27, 1965

Astro finds a big egg in a cave. He asks Dr. Ochanomizu to identify the egg, but they are unsuccessful. So Astro goes back to the island, where he encounters a strange bird that lives there.

1x110 - Menace from Mercury

March 6, 1965

Astro is investigating a super thermal bomb that has fallen on earth. Then he heads for Mercury to find its launching site. On his way, however, Astro loses his sight in an accident, and gets involved in a power struggle with aliens on Mercury.

1x111 - Robot Polymer

March 13, 1965

1x112 - Samson’s Hair

March 27, 1965

1x113 - Dangerous Mission

April 3, 1965

A country called Back suddenly withdraws from the World Peace Union, and announces to its people a ban on invention and laughter. Astro and Dr. Ochanomizu visit the country to find out what is behind this dictatorial policy.

1x114 - Metro Monster

April 10, 1965

1x115 - The Big Runaway Safe

April 17, 1965

1x116 - The Greatest Robot on Earth (part one)

April 24, 1965

A robot, Pluto is built to kill the 7 strongest robots in the world, therefore making him the world's most powerful robot.

1x117 - The Greatest Robot on Earth (part two)

May 1, 1965

Pluto succeeds in disposing of Montblanc, North #2, Brando, Gesicht, Hercules, and Photar with ease, leaving Astro as his sole remaining target. After meeting Astro, he begins to question his actions.

1x118 - Robot Grabby

May 8, 1965

1x119 - Planet 13

May 15, 1965

Planet M, shaped like a convex lens, is approaching the Earth. It reflects solar light toward the Earth, turning its surface into hell. Humans, however, cannot cooperate in tackling this global issue because they are all motivated by their own greed.

1x120 - Time Hunter

May 22, 1965

1x121 - Prisoners in Space

May 29, 1965

Astro and Dr. Ochanomizu wander into a space graveyard that lies outside every sphere of gravitation, drifting in space. Then an earthling named Bemski, who hates the Earth, rescues them.

1x122 - The Monster Mantler

June 5, 1965

1x123 - Captain Dog

June 19, 1965

1x124 - Double trouble

July 3, 1965

Higeoyaji's pet dog Pero has a diamond that it took back from space. Dr. Fooler puts Pero's memory into the computer of Captain Dog, the robot dog, to make it find diamonds. Astro follows the robot dog, which is heading for Mars.

1x125 - Find the Bacteria

July 10, 1965

1x126 - Roboids

July 17, 1965

1x127 - The Experimental Robot

July 24, 1965

1x128 - Treasures of the Inca Empire

July 31, 1965

1x129 - Atom vs. Atom

August 14, 1965

1x130 - The Storm on Mars

August 21, 1965

1x131 - The Moon Champion

August 28, 1965

1x132 - Prince Louis

September 4, 1965

1x133 - Revenge After Ten Years

September 11, 1965

1x134 - Operation Escape

September 18, 1965

1x135 - The Robot-Dog Backy

September 25, 1965

1x136 - Inspector Jaguar

October 2, 1965

1x137 - Little Cooley

October 9, 1965

1x138 - 1 Long Day

October 16, 1965

1x139 - Atom Stolen

October 23, 1965

1x140 - The King and Atom

October 30, 1965

1x141 - The Locomotive March

November 6, 1965

1x142 - Minya’s Star

November 13, 1965

Astro Boy and a group of passengers from a doomed rocketliner are stranded on an asteroid with strange characteristics and a mysterious monster.

1x143 - Bird Street Story

November 20, 1965

1x144 - Lost Friendship

November 27, 1965

1x145 - Atom in the Deep Sea

December 4, 1965

1x146 - Report from the Future

December 11, 1965

1x147 - Mid-air Screen

December 18, 1965

1x148 - Robio and Robiet

December 25, 1965

1x150 - Miss Magnet

January 8, 1966

1x151 - Lonely Atom

January 15, 1966

1x152 - The Robot Bombs

January 22, 1966

1x153 - The Red Merry-Go-Round

January 29, 1966

1x154 - Blue Bird Story

February 5, 1966

1x155 - The Crazed Boundary

February 12, 1966

1x156 - Robot Mayor

February 19, 1966

1x157 - Gypsy’s Star

February 26, 1966

1x158 - Funny Companion

March 5, 1966

1x159 - Devil and Angel

March 19, 1966

1x160 - The Golden Flute

March 28, 1966

1x161 - Dream-Selling Aliens

April 2, 1966

1x162 - Operation Candy

April 9, 1966

1x163 - Road to Another World

April 16, 1966

1x164 - The Space Spider

April 23, 1966

1x165 - A Great Fuss Over Babies

April 30, 1966

1x166 - The Jewel-Eating Monster

May 7, 1966

1x167 - Plenty of Balloons

May 14, 1966

1x168 - The Island That Jumped Up

May 21, 1966

1x169 - Gift from the Future

May 28, 1966

1x170 - Two Princesses

June 4, 1966

1x171 - Kutcher Forever

June 11, 1966

1x172 - The Herald Brothers

June 25, 1966

1x173 - Robotty

July 2, 1966

1x174 - The Great Submarine Canal

July 9, 1966

1x175 - Robot Wars (part one)

July 23, 1966

1x176 - Robot Wars (part two)

July 30, 1966

1x177 - The Gigantic Robot

August 6, 1966

1x178 - Chi-tan’s Nighttime Adventure

August 20, 1966

1x179 - Blue Horseman (part one)

August 27, 1966

1x180 - Blue Horseman (part two)

September 3, 1966

1x181 - Ghost Manufacturing Machine

September 10, 1966

1x182 - Demented Cobalt

September 24, 1966

1x183 - Japanese People from Space

October 1, 1966

1x184 - Time War

October 8, 1966

1x185 - Star of Africa

October 22, 1966

1x186 - Monsters Come out at Night

October 29, 1966

1x187 - Baily’s Legend

November 5, 1966

1x188 - Tengu of Kurama

November 19, 1966

1x189 - Confusion at the Shooting Studio

November 26, 1966

1x190 - Miracle of Mesopotamia

December 3, 1966

1x191 - Wandering Roppi

December 17, 1966

1x192 - Medusa’s Mansion

December 24, 1966

1x193 - The Greatest Adventure on Earth

December 31, 1966