| Episode |
3-2-1 Contact Communication: Human Communication |
1980 |
| Episode |
3-2-1 Contact Light/Dark: The Sun |
1980 |
| Episode |
3-2-1 Contact Light/Dark: Adaptation of Plants/Animals |
1980 |
| Episode |
3-2-1 Contact Light/Dark: Electromagnetic Spectrum |
1980 |
| Episode |
3-2-1 Contact Communication: Animal Communication |
1980 |
| Episode |
3-2-1 Contact Communication: Machinery of Communication |
1980 |
| Episode |
3-2-1 Contact Light/Dark: The Eye |
1980 |
| Episode |
3-2-1 Contact Communication with Other Species |
1980 |
| Episode |
3-2-1 Contact Light/Dark: Light Sources |
1980 |
| Episode |
3-2-1 Contact Communication: Feedback |
1980 |
| Episode |
3-2-1 Contact Surfaces: Protection |
1980 |
| Episode |
3-2-1 Contact Surfaces: Surface of the Earth |
1980 |
| Episode |
3-2-1 Contact Surfaces: The Atmosphere – Skin of the Earth |
1980 |