Name	First Aired	Runtime	Image	Certified
S07E01	Roller Coaster; Quicksand; Jelly-Side Down; Lemons; White Tiger	October 14, 1989 PBS	30
S07E02	Bee Stings; Bowling; High-Speed Elevator; Lemons; Boa	October 21, 1989 PBS	30
S07E03	Race Cars; Spider Webs; Lemons; Tropical Fish	October 28, 1989 PBS	30
S07E04	Rain Forest; Buoyancy; Pouring Catsup; Lemons; Cold Remedies	November 4, 1989 PBS	30
S07E05	Caffeine; Butterfly Migration; Autumn Leaves; Lemons; Doppler Effect; Sloth	November 11, 1989 PBS	30
S07E06	Surfing; Geothermal/Volcanoes; Luau; Sugar Processing; Hawaiian Language; Eel	November 18, 1989 PBS	30
S07E07	Whale Watch; Sunspots; Lemons; Skunk	November 25, 1989 PBS	30
S07E08	Milky Way; Epilepsy; Lemons; Inventors Fair; Cuttlefish	December 2, 1989 PBS	30
S07E09	DNA; Rube Goldberg Contest; Parrot Chat; Chewing Tin Foil; Seahorse	December 9, 1989 PBS	30
S07E10	Marathons; Celestial Navigation; Cataracts Chat; Lemons; Echidna	December 16, 1989 PBS	30
S07E11	Spinal Cord; Glue; Lemons; Dog Behavior	December 23, 1989 PBS	30
S07E12	Cheese; Aging; Appendix Chat; Wolves	December 30, 1989 PBS	30
S07E13	Supercomputer; Greenhouse Effect; House Creaking; Owl	January 6, 1990 PBS	30