| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S04E01 | Emergency |
September 1, 1974
BBC One
|
50 | |
| S04E02 | Secret Meetings |
September 8, 1974
BBC One
|
50 | |
| S04E03 | Investigations |
September 15, 1974
BBC One
|
50 | |
| S04E04 | Happy Anniversary |
September 22, 1974
BBC One
|
50 | |
| S04E05 | Partings |
September 29, 1974
BBC One
|
50 | |
| S04E06 | Loneliness |
October 6, 1974
BBC One
|
50 | |
| S04E07 | Hit and Miss |
October 13, 1974
BBC One
|
50 | |
| S04E08 | Public Concern |
October 20, 1974
BBC One
|
50 | |
| S04E09 | The Race |
October 27, 1974
BBC One
|
50 | |
| S04E10 | Saturday |
November 3, 1974
BBC One
|
50 | |
| S04E11 | The Guilt Behind the Gingerbread |
November 10, 1974
BBC One
|
50 | |
| S04E12 | A Bad Mistake |
November 17, 1974
BBC One
|
50 | |
| S04E13 | The Fall Guy |
November 24, 1974
BBC One
|
50 | |
| S04E14 |
The Crucial Vote
season finale
|
December 8, 1974
BBC One
|
50 |
No artwork of this type.
No artwork of this type.
No artwork of this type.