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