Barbara Bach

Amanda Marvin

Claudio Cassinelli

Lt. Claude de Ross

Richard Johnson

Edmond Rackham

Beryl Cunningham

Shakira

Joseph Cotten

Prof. Ernest Marvin

Franco Javarone

Jose

Roberto Posse

Peter

Giuseppe Castellano

Skip

Franco Mazzieri

Francois

Cameron Mitchell

Decker (US version)

Mel Ferrer

Radcliffe (US version)

Eunice Bolt

Samantha (US Version)

Jim Alquist

James (US version)

Tom J. Delaney

Patterson (US version)

Bobby Rhodes

Rackham's Servant (uncredited)

Sergio Martino