Black Box Affair (Italian: Black Box Affair - Il mondo trema, Spanish: Amenaza black box) is a 1966 Italian-Spanish Eurospy film written and directed by Marcello Ciorciolini and starring Craig Hill (at his only spy film) and Teresa Gimpera.[1] Hill first met Gimpera in this film, and the couple got married shortly later.[1] It is one of the rare films of the time depicting an alliance between Soviets and Americans to face a higher menace.[2]