"Down-on-his-luck Mike Cormack is hired to fly to a Caribbean island to retrieve a missing ruby. On the island, possibly involved with the ruby's disappearance, is his ex-girlfriend."
John Payne
as Mike Cormack
Mary Murphy
as Janet Martin
Francis L. Sullivan
as Barzland
Eduardo Noriega
as Inspector Peña
Arnold Moss
as Paul Armand
Walter Reed
as Lawrence
Sándor Szabó
as Johann Torbig
Pepe Hern
as Lalo
Robert Cabal
as Miguel
Paul Picerni
as Eduardo Martin
Mario Siletti
as Surgeon
Matty Fain
as Pit Boss
Ralph Dumke
as Casino Drunk
Lillian Molieri
as Girl at Juke Box
Gil Barreto
as Man (uncredited)
Victor Bartell
Tom Bernard
Eumenio Blanco
as Fight Spectator (uncredited)
Argentina Brunetti
as Pottery Maker (uncredited)
Steve Carruthers
as Casino Patron (uncredited)
Edward Coch
Delmar Costello
Sayre Dearing
Henry A. Escalante
Duke Fishman
Bess Flowers
Ben Frommer
Nacho Galindo
as Carlos Peñasco (uncredited)
David Garcia
Kenneth Gibson
Jose Gonzales-Gonzales
as Cock Fight Man (uncredited)
Dick Gordon
Josefa Heredia
Ramiro Jaloma
Manuel López
Paul Marion
as Juke Box Pitchman (uncredited)
Margarita Martín
Harold Miller
Alex Montoya
as Cock Fight Official (uncredited)
Julia Montoya
Forbes Murray
Monty O'Grady
José Oliveira
Don Orlando
Murray Pollack
Paul Regas
as Penal Colony Guard (uncredited)
Carlos Rivero
Jack Tornek
William H. Pine
Producer
Lionel Lindon
Director of Photography
Martin Goldsmith
Story
Phil Karlson
Director
Archie Marshek
Editor
Jack Leonard
William C. Thomas
Sam Comer
Set Decoration
Otto Siegel
Maxwell Shane
Screenplay
Al Roelofs
Art Direction
Hal Pereira
Wally Westmore
Makeup Supervisor
Edith Head
Wardrobe Supervisor
Michael D. Moore
Assistant Director
Ralph Axness
Second Assistant Director