- 4 - 20TimeSep. 12, 1997
- 4 - 19FossilsSep. 05, 1997
- 4 - 18ComputersApr. 25, 1996
- 4 - 17InventionsFeb. 21, 1996
- 4 - 16HeartFeb. 14, 1996
- 4 - 15InvertebratesFeb. 07, 1996
- 4 - 14VolcanoesJan. 31, 1996
- 4 - 13AmphibiansJan. 30, 1996
- 4 - 12DesertsJan. 29, 1996
- 4 - 11ArcheologyJan. 28, 1996
- 4 - 10FlowersJan. 27, 1996
- 4 - 9PseudoscienceJan. 26, 1996
- 4 - 8ProbabilityJan. 19, 1996
- 4 - 7Pollution SolutionsJan. 12, 1996
- 4 - 6SpidersJan. 05, 1996
- 4 - 5NTV Top 11 Video CountdownDec. 01, 1995
- 4 - 4EarthquakesNov. 24, 1995
- 4 - 3Marine MammalsNov. 17, 1995
- 4 - 2NutritionNov. 10, 1995
- 4 - 1Rivers & StreamsNov. 03, 1995