Ep. 3: Atom travels to Deimos to investigate mining robots that disobey human commands
Aired on April 20, 2003

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Mining robots on the planet Deimos suddenly begin acting against human orders, causing turmoil as they dig holes without permission. Upon hearing the news, Dr. Ochanomizu heads for Deimos. Although Atom is ordered to stay behind, he sneaks into the spaceship and accompanies him. As Atom desperately searches for the reason behind the robots' rebellion, he uncovers a surprising truth regarding their actions.
Episodes
- Ep. 1 · Dr. Ochanomizu activates Atom using Metro City's energy while a Geoworm malfunctions
- Ep. 2 · Robot Ball players manipulated by Dr. Tenma engage in violent foul play.
- Ep. 3 · Atom travels to Deimos to investigate mining robots that disobey human commands
- Ep. 4 · Atom befriends Kenichi, Tamao, and Shibugaki while meeting the mysterious robot Lightning.
- Ep. 5 · Katari sabotages the robot farm in Rainbow Canyon, endangering Dr. Toneriko and the Vegeta robots.
- Ep. 6 · Tokugawa commissions Dr. Tenma to build a robot successor for his deceased son Daichi, who becomes the hostile Atlas.
- Ep. 7 · Dr. Ochanomizu reveals Atom's true origin while Atlas regenerates and heads to the Moon.