This
1966 Ingmar Bergman film is my second Bergman. I thought it was brilliant. It tells the story of a mute woman who is a former actress, and her nurse. It's shot in black and white and is incredibly arty. The lines between the nurse and the actress blur until the audience is not sure who is crazy and who is sane. Are they the same person? Who is mad? Who is in control.
There are some wonderfully creepy images here
Beautifully shot and wonderfully acted with a lot of involvement from the two main actresses. The film is short, which actually adds to its power.