The plot of this film bears some resemblances to the story of Mary Pinchot Meyer, a Georgetown socialite and artist who was murdered on October 12, 1964. In life, Mrs. Meyer was the ex-wife of the head of the CIA and had been having an affair with President John F. Kennedy.
The iconic Washington stairs that featured prominently in The Exorcist (1973) make an appearance at the end of the film.
The film's original title was "Boy of Pigs", a play on the Bay of Pigs incident that took place in Cuba and spearheaded the Cuban Missile Crisis.
Although set in Washington, the film was actually shot in Baltimore.
The film's closing credits state that the picture was "filmed entirely on location in Baltimore MD [Maryland] & Washington DC [District of Columbia]" in the USA.