Man Made Monster (1941) launched Lon Chaney Jr.'s career as a star in horror films and the film's success directly led to his casting in the big budget role of his career, The Wolf Man (1941).
Budgeted at a mere $86,000 on a 3-week shooting schedule. It was the cheapest feature film produced by Universal in 1941.
Based on the story, "The Electric Man" which Universal had purchased for $3,300 in 1935 as a potential Boris Karloff / Bela Lugosi vehicle to be titled "The Man in the Cab." The studio, in the midst of a financial debacle at the time, shelved the project for over five years, assigning the re-write to George Waggner (working as "Joseph West") who re-tooled it as "The Human Robot."
Byron Foulger's role as '2nd Alienist' was cut prior to release, reducing the film's running time to under an hour, but he still receives on-screen billing. The scene was two psychiatrists discussing Dan's motives for killing.