| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S20E01 | Episode 1 |
June 16, 1978
BBC One
|
45 | |
| S20E02 | Episode 2 |
June 23, 1978
BBC One
|
45 | |
| S20E03 | Episode 3 |
June 30, 1978
BBC One
|
45 | |
| S20E04 | Episode 4 |
July 7, 1978
BBC One
|
45 | |
| S20E05 | Episode 5 |
July 14, 1978
BBC One
|
45 | |
| S20E06 |
Episode 6
series finale
|
July 21, 1978
BBC One
|
45 |
No artwork of this type.
No artwork of this type.
No artwork of this type.