Betty Beall (Judi Fielding) fight with her doppelganger
I'm watching, sorta paying attention, when I see Judi's doppelganger show up in her bedroom, and then fighting with her at the door. I sat up and said "Woah".
It looked like there were really 2 of them, not an old split screen or a double filmed from the back. And this was way before computers made this sort of thing easy.
I did find that Betty Beall has a sister named Barbara Beall. Neither of their bios has much info, not even their brithdates. But they did work in two projects together.
I wonder if they're twins, and one (Barbara?) only played Betty's doppelganger?