- Luke Halpin
- Sandy Ricks
- Pamela Franklin
- Penny
- Helen Cherry
- Julia
- Tom Helmore
- Sir Halsey Hopewell
- Francesca Annis
- Gwen
- Brian Kelly
- Porter Ricks
- Joe Higgins
- L.C. Porett
- Lloyd Battista
- Gil
- Gordon Dilworth
- Sea Captain
- Courtney Brown
- Convict
- William Cooley
- Second Convict
- Dan Chandler
- Coast Guard Commander
- Ricou Browning
- Dr. Burton
- Richard O'Barry
- Veterinarian
- Robert Baldwin
- Veterinarian
- Mitzie
- Flipper