"Fiend Without a Face" was made entirely in England. Its Canadian setting was chosen because it would appeal to both American and British Commonwealth movie audiences, while still being easy to replicate using the English shooting locations. U. S. Air Force stock aviation footage was also used to establish the military base setting and to pad out the film's meager running time. The producers used primarily expatriate American and Canadian actors working in the United Kingdom, plus a few British actors dubbed by Americans.