18. évad
Képek
| # | Kép | Cím | Bemutató |
|---|---|---|---|
| 1 | Return to Mt. St. Helens | 1991. jan. 8. | |
| 2 | ConFusion in a Jar | 1991. jan. 15. | |
| 3 |  | The Hunt for China’s Dinosaurs | 1991. febr. 5. |
| 4 | The Case of the Flying Dinosaur | 1991. febr. 12. | |
| 5 | T. rex Exposed | 1991. febr. 19. | |
| 6 | Russian Right Stuff: The Invisible Spaceman | 1991. febr. 26. | |
| 7 | Russian Right Stuff: The Dark Side of the Moon | 1991. febr. 27. | |
| 8 | Russian Right Stuff: The Mission | 1991. febr. 28. | |
| 9 | Swimming With Whales | 1991. márc. 5. | |
| 10 | The Chip vs. the Chess Master | 1991. márc. 26. | |
| 11 | Sex, Lies and Toupee Tape | 1991. okt. 1. | |
| 12 | So You Want to Be a Doctor? | 1991. okt. 9. | |
| 13 | Secrets of the Dead Sea Scrolls | 1991. okt. 15. | |
| 14 | Suicide Mission to Chernobyl | 1991. okt. 22. | |
| 15 | Taller Than Everest? | 1991. nov. 5. | |
| 16 | Fastest Planes in the Sky | 1991. nov. 12. | |
| 17 | Avoiding the Surgeon's Knife | 1991. dec. 3. | |
| 18 | Skyscraper! | 1991. dec. 10. | |
| 19 | The Art of Faking It | 1991. dec. 17. |