Dick Purcell

as James 'Mac' McCarthy

Joan Woodbury

as Barbara Winslow

Mantan Moreland

as Jefferson 'Jeff' Jackson

Henry Victor

as Dr. Miklos Sangre

John Archer

as Bill Summers

Patricia Stacey

as Alyce Sangre

Guy Usher

as Admiral Wainwright

Marguerite Whitten

as Samantha

Leigh Whipper

as Momba

Madame Sul-Te-Wan

as Tahama

James Davis

as Lazarus

Laurence Criner

as Dr. Couillie

Josephine Whitten

as Native Girl