| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | Episode 1 |
September 27, 2021
BBC One
|
44 | |
| S04E02 | Episode 2 |
September 28, 2021
BBC One
|
44 | |
| S04E03 | Episode 3 |
September 29, 2021
BBC One
|
44 | |
| S04E04 | Episode 4 |
September 30, 2021
BBC One
|
43 | |
| S04E05 | Episode 5 |
October 1, 2021
BBC One
|
43 | |
| S04E06 | Episode 6 |
October 4, 2021
BBC One
|
44 | |
| S04E07 | Episode 7 |
October 5, 2021
BBC One
|
44 | |
| S04E08 | Episode 8 |
October 6, 2021
BBC One
|
44 | |
| S04E09 | Episode 9 |
October 7, 2021
BBC One
|
43 | |
| S04E10 |
Episode 10
season finale
|
October 8, 2021
BBC One
|
44 |
No artwork of this type.
No artwork of this type.
No artwork of this type.