Rel Grainer
George
Richard Palmer
Julian
Gillian Harrison
Anne
John Bailey
Dick
Robert Cawdron
Luke Undown
Nicholas Bruce
Jim
Peter Burton
Quentin Kirrin
Iris Russell
Margaret Kirrin
Robert Dean
Cmdr. Mainbridge
John Charlesworth
Jan
Rufus Cruickshank
Captain Zachary (as Rufus Cruikshank)
An Enid Blyton adventure about four young cousins on an island off the Dorset coast in England where a shipwreck attracts the attention of greedy men who might put our heroes in danger.