| Name | Character | Episodes |
|---|---|---|
| Joe Boyd | Self | 3 |
| David Attenborough | Self | 1 |
| Bob Dylan | Self (archival footage) | 1 |
| Martin Luther King Jr. | Self (archival footage) | 1 |
| Ossie Davis | Self (archival footage) | 1 |
| Joan Baez | Self (archival footage) | 1 |
| Donovan | Self | 1 |
| Billy Bragg | Self | 1 |
| Benjamin Britten | Self (archival footage) | 1 |
| Enya | Self (archival footage) | 1 |
| Sandy Denny | Self (archival footage) | 1 |