Dale Robertson as Vance Colby

Debra Paget as Melanie Barbee

Thomas Gomez as Antoine Barbee

Lisa Daniels as Ivette Rivage

Kevin McCarthy as Andre Rivage

John Wengraf as Nicholas Cadiz

Douglas Dick as Claude St. Germaine

Henri Letondal as Police Commissioner Robert Renard

Donald Randolph as Pierre Bonet

Jay Novello as Rene Garonne

Woody Strode as Josh

Bill Walker as Rivage's Butler (uncredited)

Parley Baer as Riverboat Captain (uncredited)

Peter Mamakos as Etienne (uncredited)