| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | Episode 1 |
September 7, 2020
BBC One
|
45 | |
| S04E02 | Episode 2 |
September 8, 2020
BBC One
|
45 | |
| S04E03 | Episode 3 |
September 9, 2020
BBC One
|
45 | |
| S04E04 | Episode 4 |
September 10, 2020
BBC One
|
45 | |
| S04E05 | Episode 5 |
September 11, 2020
BBC One
|
45 | |
| S04E06 | Episode 6 |
September 14, 2020
BBC One
|
45 | |
| S04E07 | Episode 7 |
September 15, 2020
BBC One
|
45 | |
| S04E08 | Episode 8 |
September 16, 2020
BBC One
|
45 | |
| S04E09 | Episode 9 |
September 17, 2020
BBC One
|
45 | |
| S04E10 | Episode 10 |
September 18, 2020
BBC One
|
45 | |
| S04E11 | Episode 11 |
September 21, 2020
BBC One
|
45 | |
| S04E12 | Episode 12 |
September 22, 2020
BBC One
|
45 | |
| S04E13 | Episode 13 |
September 23, 2020
BBC One
|
45 | |
| S04E14 | Episode 14 |
September 24, 2020
BBC One
|
45 | |
| S04E15 |
Episode 15
series finale
|
September 25, 2020
BBC One
|
45 |
No artwork of this type.
No artwork of this type.
No artwork of this type.