When a man mysteriously vanishes on his ship in the Caribbean, his two brothers journey there to investigate his disappearance.
| Actor | Role |
|---|---|
 Jeff RichardsMark Christopher | Mark Christopher |
 Richard ChamberlainDean Christopher | Dean Christopher |
 Margia DeanRue Amboy | Rue Amboy |
 Peter FalkTom Weber | Tom Weber |
 Terence de MarneyAshby | Ashby |
 Robert Earl JonesTobias | Tobias |
| GGina PetrushkaGrandmere | Grandmere |
| LLarry MarkowKilt | Kilt |
| PPhilip RosenTwine | Twine |
| FFrank RiccoHenri | Henri |
| JJerry MitchellJerry | Jerry |
| BBen BlumPriest (uncredited) | Priest (uncredited) |