I am looking for the tite of an old black and white movie that I watched on TV in the early 70's however probably made in the 50's or 60's. It was about some woman (who was an alien of some sort) who could change her face to look like someone else. She would kill the person then she would just look like that person. There is a doctor in the movie who puts her in this tank with a window to keep her at bay I guess. She looks pretty scary, she had either sequins or scales on her head, she had a gap between her teeth. I don't know much more than that. But this film has haunted me for a long time and id like to see it again if I could figure out what the name is.
Thank you for any help.

This sounds a lot like "Species," starring Natasha Henstridge, except
This was in color in 1995. She was kept in a large tank of water and had scales
Until she metamorphosed. Just a thought.

Species (1995) - Movie Details - Yahoo! Movies

Here's what she originally looks like:

Species (1995) - Production Photos - Yahoo! Movies

Sounds like a movie I am trying to remember. The tank was a transporter with a window the doctor was reaching into the future and bring back articles that were radeactive. He transported back a deformed cat and this woman was transported back she killed a nurse who was coming to help an took her face she had sparkles on her head and was deformed also has spaces between her front teeth they found out about her because she didn't switch shoes she escaped back into the transporter into the future. Took place on a island they had to boat to the main shore/ does this stand right if so it will give added information

Sounds like a movie I am trying to remember. The tank was a transporter with a window the doctor was reaching into the future and bring back articles that were radioactive. He transported back a deformed cat and this woman was transported back she killed a nurse who was coming to help an took her face she had sparkles on her head and was deformed also has spaces between her front teeth they found out about her because she didn't switch shoes she escaped back into the transporter into the future. Took place on a island they had to boat to the main shore/ does this stand right if so it will give added information

Terror in the year 5000

I just looked this up and this is the movie. Thank you so much for your answer :) This movie has been haunting me for about 25 to 30 years.