Anthony Eisley as Lt. Harry Sennet

Wandisa Guida as Kary

Folco Lulli as Rehte

Diana Lorys as Capt. Patricia Flanagan

Luisa Rivelli as Sylvia White

Francisco Sanz as Prof. Rooney

José María Caffarel as Archie White

Renato Montalbano as Mills of Security Section

Oreste Palella as Chief of Section S

Luciana Petri as Seaplane Hostess