Four cousins meet a new friend who has strange powers over all the animals on Whispering Island. After discovering the crusader's treasure, they are imprisoned in a flooded dungeon.
| Actor | Role |
|---|---|
| DDavid PalmerJulian | Julian |
| DDarryl ReadDick | Dick |
| MMandy HarperGeorge | George |
| PPaula BoydAnne | Anne |
 Michael BalfourEmilio | Emilio |
| KKeith PyottSir Hugo Blaize | Sir Hugo Blaize |
 Robin HunterSydney | Sydney |