Need title to old old TV movie
Hi, I am trying to find the name of a movie I saw when I was only about 10 or 11. I have no idea what year it was made except I saw it around 1970 -1979. It was about this aliean woman who was able to kill someone and then her face would turn into the face of the person she just killed. I think there was a scientist who tried to keep control of her and he had put her into this metal tank or something. When the woman looked like herself she was kind of scary, her front teeth had a space between them, and she was wearing some kind of sequined form fitting hat that was actually part of the rest of what she was wearing. The part I remember is when she killed this nurse and then all of a sudden she looked just like the nurse and she pretended to be her. I don't remember the rest but would like to see it again. I think it was probably made in the 40' 50s or 60's.