3-2-1 Contact — Season 1 watch online

Episodes — Season 1

1. 1 Episode 1 «Noisy/Quiet: Production & Processing of Sound» January 14, 1980
2. 2 Episode 2 «Noisy/Quiet: The Ear» January 15, 1980
3. 3 Episode 3 «Noisy/Quiet: How People & Animals Use Sound» January 16, 1980
4. 4 Episode 4 «Noisy/Quiet: Music» January 17, 1980
5. 5 Episode 5 «Noisy/Quiet: Range of Vibration» January 18, 1980
6. 6 Episode 6 «Forces and Motion» March 24, 1980
7. 7 Episode 7 «Forces and Fields» March 25, 1980
8. 8 Episode 8 «Forces: Buoyancy and Gravity» March 26, 1980
9. 9 Episode 9 «Forces and Machines» March 27, 1980
10. 10 Episode 10 «Forces: A Spectacle of Forces» March 28, 1980
11. 11 Episode 11 «Growth/Decay: Sex and Seeds» March 10, 1980
12. 12 Episode 12 «Growth/Decay: Human Growth» March 11, 1980
13. 13 Episode 13 «Growth/Decay: Decay» March 12, 1980
14. 14 Episode 14 «Growth/Decay: Human Cultures/Land Forms» March 13, 1980
15. 15 Episode 15 «Growth/Decay: Cycles Upon Cycles» March 14, 1980
16. 16 Episode 16 «Fast/Slow: Speed Up, Slow Down» January 28, 1980
17. 17 Episode 17 «Fast/Slow: Rhythms of Nature» January 29, 1980
18. 18 Episode 18 «Fast/Slow: Lifetimes» January 30, 1980
19. 19 Episode 19 «Fast/Slow: Speed and Racing» February 7, 1980
20. 20 Episode 20 «Fast/Slow: Time and Time Again» February 1, 1980
21. 21 Episode 21 «Communication: Human Communication» March 17, 1980
22. 22 Episode 22 «Communication: Animal Communication» March 18, 1980
23. 23 Episode 23 «Communication: Machinery of Communication» March 19, 1980
24. 24 Episode 24 «Communication with Other Species» March 20, 1980
25. 25 Episode 25 «Communication: Feedback» March 21, 1980
26. 26 Episode 26 «Food/Fuel: Animal Food» February 4, 1980
27. 27 Episode 27 «Food/Fuel: Human Food» February 5, 1980
28. 28 Episode 28 «Food/Fuel: Growing and Processing Food» February 6, 1980
29. 29 Episode 29 «Food/Fuel: Fueling Machines» February 7, 1980
30. 30 Episode 30 «Food/Fuel: The Sun Makes Everything Go» February 8, 1980
31. 31 Episode 31 «Hot/Cold: People's Temperatures» January 21, 1980
32. 32 Episode 32 «Hot/Cold: Animal and Plant Adaptations» January 22, 1980
33. 33 Episode 33 «Hot/Cold: How Hot or Cold Can It Get?» January 23, 1980
34. 34 Episode 34 «Hot/Cold: Heat and Work» January 24, 1980
35. 35 Episode 35 «Hot/Cold: Temperatures on Earth/In Space» January 25, 1980
36. 36 Episode 36 «Light/Dark: The Sun» February 18, 1980
37. 37 Episode 37 «Light/Dark: Adaptation of Plants/Animals» February 19, 1980
38. 38 Episode 38 «Light/Dark: Electromagnetic Spectrum» February 20, 1980
39. 39 Episode 39 «Light/Dark: The Eye» February 21, 1980
40. 40 Episode 40 «Light/Dark: Light Sources» February 22, 1980
41. 41 Episode 41 «Near/Far: Seeing Isn't Always Believing» March 3, 1980
42. 42 Episode 42 «Near/Far: Mapping and Navigating Near Home» March 4, 1980
43. 43 Episode 43 «Near/Far: Mapping and Navigating Over Earth» March 5, 1980
44. 44 Episode 44 «Near/Far: Space Travel» March 6, 1980
45. 45 Episode 45 «Near/Far: Knowing Where You Are» March 7, 1980
46. 46 Episode 46 «Order/Disorder: Regular Patterns» March 31, 1980
47. 47 Episode 47 «Order/Disorder: The Body â€" An Ordered System» April 1, 1980
48. 48 Episode 48 «Order/Disorder: Social Order» April 2, 1980
49. 49 Episode 49 «Order/Disorder: Disordered» April 3, 1980
50. 50 Episode 50 «Order/Disorder: Sum of Its Parts» April 4, 1980
51. 51 Episode 51 «Surfaces: Protection» April 7, 1980
52. 52 Episode 52 «Surfaces: Shapes and Functions at the Surface» April 8, 1980
53. 53 Episode 53 «Surfaces: Surface Tension and Bubbles» April 9, 1980
54. 54 Episode 54 «Surfaces: Surface of the Earth» April 10, 1980
55. 55 Episode 55 «Surfaces: The Atmosphereâ€"Skin of the Earth» April 11, 1980
56. 56 Episode 56 «Big/Small: Animal Sizes/Scaling» February 25, 1980
57. 57 Episode 57 «Big/Small: Animal Habitats» February 26, 1980
58. 58 Episode 58 «Big/Small: Dinoaurs» February 27, 1980
59. 59 Episode 59 «Big/Small: Volume & Efficiency» February 28, 1980
60. 60 Episode 60 «Big/Small: How Big is Big?» February 29, 1980
61. 61 Episode 61 «Crowded/Uncrowded: Human Crowding» February 11, 1980
62. 62 Episode 62 «Crowded/Uncrowded: Optimum Populations in Nature» February 12, 1980
63. 63 Episode 63 «Crowded/Uncrowded: Contrasts in Densities of Materials» February 13, 1980
64. 64 Episode 64 «Crowded/Uncrowded: Down Among the Atoms (Liquids & Solids)» February 14, 1980
65. 65 Episode 65 «Crowded/Uncrowded: Human Survival/Controlling Densities» February 15, 1980