| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | Bullet Proof Vests; Robots; Formation Skydivers |
April 4, 2007
Discovery
|
25 | |
| S04E02 |
Rally Car; Letter; Titanium
season finale
|
April 4, 2007
Discovery
|
25 | |
| S04E03 | Forest Fires; Car Exhaust; Space Station |
April 11, 2007
Discovery
|
25 | |
| S04E04 |
Spacesuit; Diesel Engines; Neon Signs
season finale
|
April 4, 2007
Discovery
|
25 | |
| S04E05 | Nuclear Sub; Crash Test Dummies; Fruit and Vegetables |
April 18, 2007
Discovery
|
25 | |
| S04E06 | Land Mines; Air Boats; Car Warehouse |
April 18, 2007
Discovery
|
25 | |
| S04E07 | Black Boxes; Steam Turbine; Racing Car |
April 25, 2007
Discovery
|
25 | |
| S04E08 |
Jet Engine; Weapons; Telescope
season finale
|
April 25, 2007
Discovery
|
25 |
No artwork of this type.
No artwork of this type.
