| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S15E01 | Christmas Special: Episode 1 |
December 9, 2019
BBC One
|
45 | |
| S15E02 | Christmas Special: Episode 2 |
December 10, 2019
BBC One
|
45 | |
| S15E03 | Christmas Special: Episode 3 |
December 11, 2019
BBC One
|
45 | |
| S15E04 | Christmas Special: Episode 4 |
December 12, 2019
BBC One
|
45 | |
| S15E05 | Christmas Special: Episode 5 |
December 13, 2019
BBC One
|
45 | |
| S15E06 |
Christmas Special: Compilation
season finale
|
December 24, 2019
BBC One
|
60 |
No artwork of this type.
No artwork of this type.
No artwork of this type.