| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | 401 |
January 9, 2014
PBS
|
27 | |
| S04E02 | 402 |
January 16, 2014
PBS
|
27 | |
| S04E03 | 403 |
January 23, 2014
PBS
|
27 | |
| S04E04 | 404 |
January 30, 2014
PBS
|
27 | |
| S04E05 | 405 |
February 6, 2014
PBS
|
27 | |
| S04E06 | 406 |
February 13, 2014
PBS
|
27 | |
| S04E07 | 407 |
February 20, 2014
PBS
|
27 | |
| S04E08 | 408 |
February 27, 2014
PBS
|
27 | |
| S04E09 | 409 |
March 6, 2014
PBS
|
27 | |
| S04E10 | 410 |
March 19, 2014
PBS
|
27 | |
| S04E11 | 411 |
March 27, 2014
PBS
|
27 | |
| S04E12 | 412 |
April 3, 2014
PBS
|
27 | |
| S04E13 |
413
season finale
|
April 9, 2014
PBS
|
27 |
No artwork of this type.
No artwork of this type.
No artwork of this type.