The film stars Eddie Constantine as Al Pereira, a spy brought out of retirement to investigate a series of murders conducted by a robot-like army of people with black-framed glasses and strange darkened skin.

There, he thwarts his kidnapping by the servants of Lee-Wee, a Chinese crime syndicate boss, who is also trying to discover the mystery of these murders for his nefarious use.

The masterminds behind the crimes are revealed to be Lady Cecilia and Sir Percy who created an army of mind-controlled people to carry out the murders.

After Pereira thwarts an attack on him by one of the robot-like people, he dons the individual's spectacles, leading him to fall under the influence of Cecilia and Percy and is summoned to their hideout.

[5] Constantine was an American singer who moved to France in the 1950s and embarked on a career in acting, becoming a popular actor through his role as the secret agent Lemmy Caution in a series of spy films starting with La môme vert-de-gris (1953).

[6] Director Jesús Franco was not a fan of Constantine's acting or his films, stating the actor had "one of the world's most expressionless faces".

[5] Franco changed his mind after Constantine had starred in Jean-Luc Godard's film Alphaville (1965), which the director would include brief references to in Attack of the Robots.

"[8] Franco said to subvert this, he had screenwriter Jean-Claude Carrière make Constantine's character a clumsy secret agent.

[10] Carrière had openly dismissed b-films, and said that Franco had "great taste in films...At the same time, he could not comply with the discipline of the shooting [...] It was always too slow or too long, things had to be done quickly [...] same with the script: he could tear off a whole page of it if he needed to.

Along with Constantine and actor Fernando Rey, two French actresses were included: Geneviève Cluny as Cynthia and Françoise Prévost as Lady Cecila.

[14] During filming in November, Sophie Hardy was driving back to Madrid from Alicante when her car went off-road and turned over leaving the actress unconscious off the road.

[1][2][19] The American version of the film was only available through grey market, in formats that Franco biographer Stephen Thrower described as a "monstrously ugly transfer.

[22] Latorre wrote a full review in Film Ideal in December, writing that the parody-styled take on Constantine's character overloaded with ridiculous images.

finding characters thrown into the mix with little design or purpose, and even the film's title was a crude attempt to lure audiences with a pulp science fiction premise.

While finding that critical characters of the plot would vanish for over half an hour of time, he declared that the film "isn't the least bit worse off for all that.