The Ambushers (film)

The Ambushers is a 1967 spy comedy film filmed in Acapulco starring Dean Martin, Senta Berger and Janice Rule. It is loosely based upon the novel of the same name by Donald Hamilton as well as The Menacers that featured UFOs and a Mexican setting. When a governmentbuilt flying saucer is hijacked midflight by Jose Ortega, the exiled ruler for an outlaw nation, secret agent Matt Helm and the ships former pilot Sheila Sommers are sent to recover it.

Helm had worked with Sommers on an assignment where the two had posed as man and wife. When Sommers meets Helm, her memory comes back. Mac, the head of ICE, decides to send Helm and Sommers posing again as his wife undercover as a photographer doing a story on the Montezuma Beer Brewery, whose advertising jingle is the same tune as the anthem of Ortegas political movement.Along the way, they must deal with Ortegas henchmen, Francesca Madeiros an operative for Big O, Helms main nemesis, who poses as a model and seduces Helm, an assassin named Nassim, plus a tough thug named Rocco. ........

Source: Wikipedia