George and her new friend Timmy the Dog are joined for the holidays by her cousins Julian, Dick and Anne. The Five set out to investigate a long-ago curse involving Kirrin Island, but it soon transpires they are not alone in their quest.
| Actor | Role |
|---|---|
 Diaana BabnicovaGeorge Barnard | George Barnard |
 Kit RakusenDick Barnard | Dick Barnard |
 Flora Jacoby RichardsonAnne Barnard | Anne Barnard |
 Elliott RoseJulian Barnard | Julian Barnard |
| KKipTimmy the Dog | Timmy the Dog |
 Ann AkinjirinAunt Fanny | Aunt Fanny |
 James LanceUncle Quentin | Uncle Quentin |
 William AbadieFranklin Boswell | Franklin Boswell |
 Jack GleesonThomas Wentworth | Thomas Wentworth |
 Diana QuickMrs. Wentworth | Mrs. Wentworth |
 Phillip RoyButler | Butler |