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| Aflevering | Eerste uitzending |
|---|---|
| S05E01 - In the Event of Catastrophe | 04/01/1978 |
| S05E02 - The Green Machine | 11/01/1978 |
| S05E03 - Blueprints in the Bloodstream | 18/01/1978 |
| S05E04 - One Small Step (1) | 25/01/1978 |
| S05E05 - The Final Frontier (2) | 01/02/1978 |
| S05E06 - BaMiki BaNdula: Children of the Forest | 15/02/1978 |
| S05E07 - Trial of Denton Cooley | 22/02/1978 |
| S05E08 - The Great Wine Revolution | 01/03/1978 |
| S05E09 - The Case of the Ancient Astronauts | 08/03/1978 |
| S05E10 - The Mind Machines | 22/03/1978 |
| S05E11 - Icarus' Children | 29/03/1978 |
| S05E12 - Still Waters | 12/04/1978 |
| S05E13 - Battle for the Acropolis | 19/04/1978 |
| S05E14 - The Road to Happiness: The Life and Times of Henry Ford | 03/05/1978 |
| S05E15 - Light of the 21st Century | 10/05/1978 |
| S05E16 - Insect Alternative | 24/05/1978 |
| S05E17 - The Desert's Edge | 31/05/1978 |
| S05E18 - The Tse Tse Trap | 07/06/1978 |
| S05E19 - Memories from Eden | 14/06/1978 |
| S05E20 - A Whisper from Space | 21/06/1978 |
| S05E21 - Alaska: The Closing Frontier | 28/06/1978 |