| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | Bull Run |
July 22, 2010
PBS
|
30 | |
| S04E02 | Sagebrush Symphony |
July 12, 2011
PBS
|
30 | |
| S04E03 | Vortex |
October 28, 2010
PBS
|
30 | |
| S04E04 | Opal Whiteley |
May 1, 2010
PBS
|
30 | |
| S04E05 | The Spirit Of Tek |
May 3, 2010
PBS
|
30 | |
| S04E06 |
White Plague
season finale
|
May 17, 2010
PBS
|
30 |
No artwork of this type.
No artwork of this type.