| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S18E01 | Return to Mt. St. Helens |
January 8, 1991
PBS
|
60 | |
| S18E02 | ConFusion in a Jar |
January 15, 1991
PBS
|
60 | |
| S18E03 | The Hunt for China’s Dinosaurs |
February 5, 1991
PBS
|
60 | |
| S18E04 | The Case of the Flying Dinosaur |
February 12, 1991
PBS
|
60 | |
| S18E05 | T. rex Exposed |
February 19, 1991
PBS
|
60 | |
| S18E06 | Russian Right Stuff: The Invisible Spaceman |
February 26, 1991
PBS
|
60 | |
| S18E07 | Russian Right Stuff: The Dark Side of the Moon |
February 27, 1991
PBS
|
60 | |
| S18E08 | Russian Right Stuff: The Mission |
February 28, 1991
PBS
|
60 | |
| S18E09 | Swimming With Whales |
March 5, 1991
PBS
|
60 | |
| S18E10 | The Chip vs. the Chess Master |
March 26, 1991
PBS
|
60 | |
| S18E11 | Sex, Lies and Toupee Tape |
October 1, 1991
PBS
|
60 | |
| S18E12 | So You Want to Be a Doctor? |
October 9, 1991
PBS
|
60 | |
| S18E13 | Secrets of the Dead Sea Scrolls |
October 15, 1991
PBS
|
60 | |
| S18E14 | Suicide Mission to Chernobyl |
October 22, 1991
PBS
|
60 | |
| S18E15 | Taller Than Everest? |
November 5, 1991
PBS
|
60 | |
| S18E16 | Fastest Planes in the Sky |
November 12, 1991
PBS
|
60 | |
| S18E17 | Avoiding the Surgeon's Knife |
December 3, 1991
PBS
|
60 | |
| S18E18 | Skyscraper! |
December 10, 1991
PBS
|
60 | |
| S18E19 |
The Art of Faking It
season finale
|
December 17, 1991
PBS
|
60 |
No artwork of this type.
No artwork of this type.
