Ep. 5: Katari sabotages the robot farm in Rainbow Canyon, endangering Dr. Toneriko and the Vegeta robots.
Aired on May 4, 2003

5
In Rainbow Canyon, Dr. Toneriko’s environmental control tower protects a robot farm where Vegeta robots cultivate giant vegetables despite unstable weather. Katari, a young man who despises robots, arrives with malicious intent to destroy the farm’s reputation. Mimi, Dr. Toneriko’s daughter, initially views him as an older brother figure. Katari seizes control of the tower and triggers earthquakes that shake the canyon’s crust, causing the giant vegetables to fall and injure Dr. Toneriko. The seismic activity spreads to surrounding areas, ultimately leading to the collapse of a dam and threatening the entire region.
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.
- Ep. 8 · Dr. Katō bombs the robotic train, forcing Atom to find it before speed drops or Geoworm collision occurs.
- Ep. 9 · A Frankenstein-like robot escapes a dumping valley and seeks its friend Taku.