A politically-active couple's involvement in an election campaign threatens their marriage through personal entanglements with the candidate and other campaigners.
| Name | Type | Role | |
|---|---|---|---|
| Dilys Laye | Guest Star | ||
| Peter Arne | Guest Star | ||
| Gwen Nelson | Guest Star | ||
| Jane Birkin | Guest Star | ||
| Judy Cornwell | Guest Star | ||
| John Glyn-Jones | Guest Star |