John Gavin as Hubert Bonisseur de La Bath

Margaret Lee as Aïcha Melik

Curd Jürgens as Il Maggiore

Luciana Paluzzi as Maud

Robert Hossein as Dr. Saadi

Rosalba Neri as Conchita Esteban

George Eastman as Karas

Guido Alberti as Faruk Melik

Piero Lulli as Heindrich Van Dyck - un rappresentante dell'ONU

Renato Baldini as MacLeod - un diplomatico della CIA

Seyna Seyn as La réceptionniste