And the Oscar for the most under-rated classic horror actor goes to - Dwight Frye. Seriously his name should be stated with the same awe as Karloff, Lugosi, and Price, and this movie proves it. His character Herman was one of the 2 reasons I can give to watch this movie. Dwight gave this somewhat more than slightly disturbed misfit a lovable yet creepy demeanor that led you hoping for a larger role the entire movie.
The other reason is the comic relief of M. Eburne. Being in the medical profession myself I have to give kudos to the expert performance of a self-pity prone hypochondriac. Though other "medical mistakes" did give a brief chuckle especially when the good doctor samples his fellow physicians medication... "Well continue giving it to her" Unfortunately these 2 outstanding performances could not keep me awake through 3 attempts of sitting through this unbearably slow movie. The plot is predictable with only few minor twists. The filming while pulling off a legitimate spooky atmosphere was more productive at making me yawn - yes you can use too much shadow.
My recommendation - watch this once to see Frye and Eburne - but only when wide awake and with lots of caffeine.