Season 4

1. Flight Trainers; Snake Bite; Hedgehoh Chat; Cold Remedies

1986-10-11 · 30m

2. Caves; Lasers; Skin Wrinkle Chat; Whale Birth

1986-10-18 · 30m

3. Hypothermia; Moon; Voice Change Chat; Yak

1986-10-25 · 30m

4. Sponges; Bed of Nails; Probability; Pelicans

1986-11-01 · 30m

5. Bees; Blood Pressure; Bruises Chat; Hiccups

1986-11-08 · 30m

6. Telescopes; Food Myths; Manatee

1986-11-15 · 30m

7. Fossil Dig; Mirrors; Frostbite Chat; Elephants

1986-11-22 · 30m

8. Wind Blow; Baldness; Soda Pop Fizz Chat; Cranes

1986-11-29 · 30m

9. Alcohol; Helium Balloons; Backache Chat; Roller Coaster; Snow Monkeys

1986-12-06 · 30m

10. Diabetes; Frozen Food; Flat Feet Chat; Battery Inventions; Alligators

1986-12-13 · 30m

11. Immune System; Skiing; Blimp; Beaver

1986-12-20 · 30m

12. Pterodactyl; Rube Goldberg; Black Box Chat; Quickies

1986-12-27 · 30m

13. Baseball Bats; Polarized Light; Dreams Chat; Inventors Fair; Falcon

1987-01-03 · 30m