Danger!! Death Ray

Danger Death Ray is an 1967 Italian Eurospy secret agent spy film. It was released at a time when the James Bond films, and spy films in general, were very popular internationally. Its original Italian title was Il Raggio infernale, which translates as The Infernal Beam, and it was also released in English as Nest of Spies and Death Ray. It was known in France as Le Rayon Infernal.

Scientist Jean Karl Michael invents a death ray which, according to him, is for peaceful purposes. He arranges to demonstrate the ray to a group of European NATO representatives. As he is demonstrating it, a group of enemy agents disguised as NATO officials steals the death ray, kidnap the scientist, and escape by car under the cover of night. Following a pursuit and gun battle, they escape by helicopter which lands on a submarine and is discarded as the submarine submerges. About to go on vacation, Agent Bart Fargo is given the assignment, by his boss, of retrieving the death ray and saving the scientist. He travels to Madrid on a lead to find an evil organization that may be behind this. Rooting out a nest of spies in an everenclosing trail, Bart Fargo meets a lady when he hides in her house from the opposition and befriends an enemy agent who later helps him to stop the evil organization.

Source: Wikipedia