I remember a movie, probably from the late 50’s or early 60’s that revolved around a woman who would don cat ears at night and kill people.
I’m not sure whether she supposedly grew them (i.e., became a cat), or she actually put them on as costume (i.e., symbolically became a cat).
I only know that as a young child it was terrifying.
http://www.imdb.com/title/tt0734612/?ref_=fn_tt_tt_19
Could you be thinking of the 1942 version of CAT PEOPLE? You don’t really see her though as a cat. It’s implied.
“Blood of Dracula”(1957)?
She is a young woman who turns into a vampire. When she does, she grows pointy ears and fangs and looks somewhat cat-like.
https://s-media-cache-ak0.pinimg.com/736x/62/57/e1/6257e1dbf4b116d252cb56a3943d6576.jpg
Here is what the Blood of Dracula chick looked like.
I found this still from Cat People, although I don’t remember it.
https://i.ytimg.com/vi/QHDHd51cpDY/hqdefault.jpg
http://www.imdb.com/title/tt0050235/
“Kuroneko”(1968)?
Great suggestions, I’m investigating.
Watched some of the Twilight Zone episode suggested — classic, but not the one.
Blood of Dracula woman — disturbing, but not a match.
Both Cat Girl and Cat People were suggested, checking into these. It’s interesting that the former is an unofficial remake of the later.
I love the Kuroneko preview!