The first films of prolific writer/director Jesus (Jess) Franco to be released in the U.S. were a series of similarly-themed black-and-white thrillers, starting with the surgical horror show The Awful Dr. Orloff (produced in 1962 by the French company Eurocine--then known as Eurocineac). The international success of that effort demanded a follow-up--yet the eventual "sequel" was one in name only. 1964's El Segreto de Doctor Orloff ("The Secret of Dr. Orloff") was released as Dr. Orloff's Monster in America, but the frail, bedridden Dr. Orloff seen in this film is neither the central character nor the same Dr. Orloff found in the previous outing.