A married man forms a liaison with a woman he meets on a train, and is divorced by his wife who allows him access to their daughters on Sundays, which they usually spend at the zoo.
| Actor | Role |
|---|---|
 Joss AcklandMalcolmson | Malcolmson |
 Mary PeachElizabeth | Elizabeth |
 Hildegard NeilDiana | Diana |
| MMandy TullochDeidre | Deidre |
| PPeter ClayRichard | Richard |
| LLysandre De La HayeSusie | Susie |
| IIan FairbairnBoard member | Board member |
| AAlan HayNot listed | Not listed |
| RRichard PendreyNot listed | Not listed |