SYNOPSIS
Mike and Tony Petrakis are a Greek father and son team who dive for sponges off the coast of Florida. After they are robbed by crooks, Arnold and the Rhys brothers, Mike decides to take his men to the dangerous 12-mile reef to dive for more sponges. Mike suffers a fatal accident when he falls from the reef leaving Tony to carry on the business. But now he has a companion, Gwyneth Rhys.
- Robert WagnerTony Petrakis
- Terry MooreGwyneth Rhys
- Gilbert RolandMike Petrakis
- J. Carrol NaishSocrates 'Soc' Houlis
- Richard BooneThomas Rhys
- Angela ClarkeMama Petrakis
- Peter GravesArnold Dix
- Jay NovelloSinan
- Jacques AubuchonDemetrios Sofotes
- Gloria GordonPenny Petrakis
- Harry Carey Jr.Griff Rhys
- Jack BurkeConch
- Guy CarletonJamison
- John ConatosJemmy
- Jack EnglishDoctor
- John George GladakisAuctioneer
- Eugene HalpinLong Arm
- James HarakasCard
- Jonathan JacksonLt. Bryant
- William JohnstoneCrewman of 'Snapper'
- Frank JoynerCaptain of 'Snapper'
- Marc KrahFat George
- John LehmanConch
- James McLaughlinAmbulance Attendant
- Demetrios I. MitsorasDeckhand on the 'Helios'