Mr. Selkie is a seal who comes ashore in the shape of a man during full moon. He helps some children in an anti-pollution campaign.
| Actor | Role |
|---|---|
| SSamantha WeysomEileen Ross | Eileen Ross |
| CClark FlanaganJimmy Ross | Jimmy Ross |
| MMichael MannionRoger Craine | Roger Craine |
| PPeter BaylissMr. Selkie | Mr. Selkie |
 Noel HowlettArthur Ross | Arthur Ross |
 Molly WeirGrannie Ross | Grannie Ross |
| ZZara NutleyMrs. Craine | Mrs. Craine |
 Derek TansleyP.C. Fletcher | P.C. Fletcher |
| CChristine OzanneSusan | Susan |