Special Guest Stars Ralph Meeker as John Dexter Guest Stars Henry Darrow as Policeman Henry Silva as Gen. Juan Mercurio Noel de Souza as Capt. Fortunado Willard Sage as First Reporter Stuart Lancaster as Skipper Janet Blair as Lynn Arthur Edward Colmans as Servant Martin Garralaga as Paco Jon Silo as Oswaldo Jay Novello as Prof. Arivello Jerry Douglas as Tom Evans Uncredited Paul Stader as Ichthyosaur Shelley Morrison as Woman Bill Hart as Ichthyosaur George Robotham as Ichthyosaur Steve Carruthers as Party Guest