Season 1
- 1Noisy/Quiet: Production & Processing of Sound14 Jan 1980
- 2Noisy/Quiet: The Ear15 Jan 1980
- 3Noisy/Quiet: How People & Animals Use Sound16 Jan 1980
- 4Noisy/Quiet: Music17 Jan 1980
- 5Noisy/Quiet: Range of Vibration18 Jan 1980
- 6Forces and Motion24 Mar 1980
- 7Forces and Fields25 Mar 1980
- 8Forces: Buoyancy and Gravity26 Mar 1980
- 9Forces and Machines27 Mar 1980
- 10Forces: A Spectacle of Forces28 Mar 1980
- 11Growth/Decay: Sex and Seeds10 Mar 1980
- 12Growth/Decay: Human Growth11 Mar 1980
- 13Growth/Decay: Decay12 Mar 1980
- 14Growth/Decay: Human Cultures/Land Forms13 Mar 1980
- 15Growth/Decay: Cycles Upon Cycles14 Mar 1980
- 16Fast/Slow: Speed Up, Slow Down28 Jan 1980
- 17Fast/Slow: Rhythms of Nature29 Jan 1980
- 18Fast/Slow: Lifetimes30 Jan 1980
- 19Fast/Slow: Speed and Racing7 Feb 1980
- 20Fast/Slow: Time and Time Again1 Feb 1980
- 21Communication: Human Communication17 Mar 1980
- 22Communication: Animal Communication18 Mar 1980
- 23Communication: Machinery of Communication19 Mar 1980
- 24Communication with Other Species20 Mar 1980
- 25Communication: Feedback21 Mar 1980
- 26Food/Fuel: Animal Food4 Feb 1980
- 27Food/Fuel: Human Food5 Feb 1980
- 28Food/Fuel: Growing and Processing Food6 Feb 1980
- 29Food/Fuel: Fueling Machines7 Feb 1980
- 30Food/Fuel: The Sun Makes Everything Go8 Feb 1980
- 31Hot/Cold: People's Temperatures21 Jan 1980
- 32Hot/Cold: Animal and Plant Adaptations22 Jan 1980
- 33Hot/Cold: How Hot or Cold Can It Get?23 Jan 1980
- 34Hot/Cold: Heat and Work24 Jan 1980
- 35Hot/Cold: Temperatures on Earth/In Space25 Jan 1980
- 36Light/Dark: The Sun18 Feb 1980
- 37Light/Dark: Adaptation of Plants/Animals19 Feb 1980
- 38Light/Dark: Electromagnetic Spectrum20 Feb 1980
- 39Light/Dark: The Eye21 Feb 1980
- 40Light/Dark: Light Sources22 Feb 1980
- 41Near/Far: Seeing Isn't Always Believing3 Mar 1980
- 42Near/Far: Mapping and Navigating Near Home4 Mar 1980
- 43Near/Far: Mapping and Navigating Over Earth5 Mar 1980
- 44Near/Far: Space Travel6 Mar 1980
- 45Near/Far: Knowing Where You Are7 Mar 1980
- 46Order/Disorder: Regular Patterns31 Mar 1980
- 47Order/Disorder: The Body â€" An Ordered System1 Apr 1980
- 48Order/Disorder: Social Order2 Apr 1980
- 49Order/Disorder: Disordered3 Apr 1980
- 50Order/Disorder: Sum of Its Parts4 Apr 1980
- 51Surfaces: Protection7 Apr 1980
- 52Surfaces: Shapes and Functions at the Surface8 Apr 1980
- 53Surfaces: Surface Tension and Bubbles9 Apr 1980
- 54Surfaces: Surface of the Earth10 Apr 1980
- 55Surfaces: The Atmosphereâ€"Skin of the Earth11 Apr 1980
- 56Big/Small: Animal Sizes/Scaling25 Feb 1980
- 57Big/Small: Animal Habitats26 Feb 1980
- 58Big/Small: Dinoaurs27 Feb 1980
- 59Big/Small: Volume & Efficiency28 Feb 1980
- 60Big/Small: How Big is Big?29 Feb 1980
- 61Crowded/Uncrowded: Human Crowding11 Feb 1980
- 62Crowded/Uncrowded: Optimum Populations in Nature12 Feb 1980
- 63Crowded/Uncrowded: Contrasts in Densities of Materials13 Feb 1980
- 64Crowded/Uncrowded: Down Among the Atoms (Liquids & Solids)14 Feb 1980
- 65Crowded/Uncrowded: Human Survival/Controlling Densities15 Feb 1980