I am looking for the title of an old black and white movie that I watched on TV in the early 70's however probably made in the 40's, 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.

"Terror in The Year 5000"

I remember an old black and white sci-fi movie about a spaceship that was found in a jungle cave. There was a force field around it and every time a person would touch the force field they would end up in the spacecraft. The only other thing I remember is the force field started to grow and it was fell to the hero's and heroine's to stop that from happening. I know at the time it scared the heck out of me and now I would like to know if anyone knows the name of the movie. I'd like to know if it's as campy as I remember it.