| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | Episode 1 |
June 11, 2012
BBC One
|
45 | |
| S04E02 | Episode 2 |
June 12, 2012
BBC One
|
45 | |
| S04E03 | Episode 3 |
June 13, 2012
BBC One
|
45 | |
| S04E04 | Episode 4 |
June 14, 2012
BBC One
|
45 | |
| S04E05 | Episode 5 |
June 15, 2012
BBC One
|
45 | |
| S04E06 | Episode 6 |
June 18, 2012
BBC One
|
45 | |
| S04E07 | Episode 7 |
June 19, 2012
BBC One
|
45 | |
| S04E08 | Episode 8 |
June 20, 2012
BBC One
|
45 | |
| S04E09 | Episode 9 |
June 21, 2012
BBC One
|
45 | |
| S04E10 | Episode 10 |
June 22, 2012
BBC One
|
45 | |
| S04E11 | Episode 11 |
June 25, 2012
BBC One
|
45 | |
| S04E12 | Episode 12 |
June 26, 2012
BBC One
|
45 | |
| S04E13 | Episode 13 |
June 27, 2012
BBC One
|
45 | |
| S04E14 | Episode 14 |
June 28, 2012
BBC One
|
45 | |
| S04E15 | Episode 15 |
June 29, 2012
BBC One
|
45 | |
| S04E16 | Episode 16 |
July 2, 2012
BBC One
|
45 | |
| S04E17 | Episode 17 |
July 3, 2012
BBC One
|
45 | |
| S04E18 | Episode 18 |
July 4, 2012
BBC One
|
45 | |
| S04E19 | Episode 19 |
July 5, 2012
BBC One
|
45 | |
| S04E20 |
Episode 20
season finale
|
July 6, 2012
BBC One
|
45 |
No artwork of this type.
No artwork of this type.
No artwork of this type.