 
     
        | Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | The Six Thatchers | January 1, 2017 BBC One | 88 | |
| S04E02 | The Lying Detective | January 8, 2017 BBC One | 89 | |
| S04E03 | The Final Problem series finale | January 15, 2017 BBC One | 89 |