Bela Lugosi ( see yesterday’s post ) wasn’t the only horror icon who starred in a series of low-budget shockers. Boris Karloff signed a five picture deal with Columbia Pictures that was later dubbed the “Mad Doctor” series and, while several notches above Lugosi’s “Monogram Nine”, they were cookie-cutter flicks intended for the lower half of double feature bills. The first of these was THE MAN THEY COULD NOT HANG, which sets the tone for the films to follow.

Karloff plays Dr. Henry Savaard, inventor of a new surgical technique that requires the patient to die, then reviving him with a mechanical heart after performing the operation. This later became standard operating procedure during open-heart surgery, but back in 1939 was considered science fiction! Anyway, Savaard’s young assistant Bob agrees to go through the experimental procedure, but his girlfriend freaks out and calls the cops, claiming Savaard is about to murder…