1 - 1A Hero for Earth Sep. 15, 1990- 1 - 2Rain of Terror Sep. 22, 1990
- 1 - 3Beast of the Temple Sep. 29, 1990
- 1 - 4Skumm Lord Oct. 06, 1990
- 1 - 5Deadly Ransom Oct. 13, 1990
- 1 - 6The Conqueror Oct. 20, 1990
- 1 - 7Last of Her Kind Oct. 27, 1990
- 1 - 8The Dead Seas Nov. 03, 1990
- 1 - 9Tree of Life Nov. 10, 1990
- 1 - 10Volcano's Wrath Nov. 17, 1990
- 1 - 11Littlest Planeteer Nov. 24, 1990
- 1 - 12A World Below Us Jan. 26, 1991
- 1 - 13Plunder Dam Feb. 02, 1991
- 1 - 14Meltdown Syndrome Feb. 09, 1991
- 1 - 15Smog Hog Feb. 16, 1991
- 1 - 16Polluting by Computer Feb. 23, 1991
- 1 - 17Don't Drink the Water Mar. 02, 1991
- 1 - 18Kwame's Crisis Mar. 09, 1991
- 1 - 19Ozone Hole Apr. 13, 1991
- 1 - 20The Ultimate Pollution Apr. 20, 1991
- 1 - 21Population Bomb Apr. 27, 1991
- 1 - 22Mission to Save Earth (1) May. 04, 1991
- 1 - 23Mission to Save Earth (2) May. 11, 1991
- 1 - 24Two Futures (1) May. 18, 1991
- 1 - 25Two Futures (2) May. 25, 1991
- 1 - 26Heat Wave Jun. 01, 1991