Frederick Douglass of "Afro-American" wrote that he liked "Dr. Black, Mr. Hyde" in his editorial review. He considered Casey to be “very convincing in his dual role” within the film. Douglass found the film entertaining and he describes it as rather “comical”, as Casey throws people around and kills them easily with superhuman strength. Despite how comical it may seem, Douglass did note in his review that the interpretation that Casey’s character’s murders of sex workers and pimps as a white monster symbolized “white as evil." Douglass did not take the film that seriously, but he appreciated the themes that the film attempted to convey.