It was Richard Chamberlain's film debut, made before finding fame as Dr Kildare.
[1] Brothers Mark (Jeff Richards) and Dean Christopher (Richard Chamberlain) and show up in a mid-'50s four door Citroën Traction Avant in early era San Juan, Puerto Rico.
They arrive to solve the mystery of the circumstances of their father's drowning death in the Caribbean.
One of the film's highlights is several scenes of an E.G. Van de Stadt designed 35 foot sailing yacht, the Starwright.
[4][5] Margia Dean enjoyed working with direction Witney and later hired him when she produced The Long Rope (1961).