Les Nuits de l'épouvante

Better than average giallo with an old-fashioned charm. It's a period piece with horses and wagons. The "Clinic" is a sanatorium of sorts. The good doctor appears to be part psychiatrist, part surgeon. There also appears to be many more staff than patients at this clinic.

Great locations. Great use of color. Great atmosphere. The soundtrack features a very old song by Giovanni Battista Granata called "Sonata di Chitarra, e Violino, con il suo Basso Continuo." It's a classical song, but it sounds a lot like Stairway to Heaven.

The acting was good. The story/mystery was fairly predictable if you've seen a number of these movies. Overall, I'd say it's worth a watch if you're a giallo fan.