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| Aflevering | Eerste uitzending |
|---|---|
| S02E01 - Why Do Birds Sing? | 03/11/1974 |
| S02E02 - How Much Do You Smell? | 10/11/1974 |
| S02E03 - The Hunting of the Quark | 17/11/1974 |
| S02E04 - The Secrets of Sleep | 24/11/1974 |
| S02E05 - Inside the Golden Gate | 01/12/1974 |
| S02E06 - The Men Who Painted Caves | 08/12/1974 |
| S02E07 - Red Sea Coral | 15/12/1974 |
| S02E08 - War from the Air | 05/01/1975 |
| S02E09 - What Time Is Your Body? | 12/01/1975 |
| S02E10 - The Rise and Fall of DDT | 19/01/1975 |
| S02E11 - Take the World from Another Point of View | 02/02/1975 |
| S02E12 - The Lysenko Affair | 09/02/1975 |
| S02E13 - The Tuaregs | 16/02/1975 |
| S02E14 - The Plutonium Connection | 09/03/1975 |
| S02E15 - The Other Way | 16/03/1975 |
| S02E16 - The Lost World of the Maya | 30/03/1975 |
| S02E17 - Will the Fishing Have to Stop? | 06/04/1975 |