As soon as they showed Adelaide in the therapists office with the mum and dad crying about how she won't talk anymore/they just want their little girl back etc. I just KNEW that Red had switched with her. But then the film had me doubting it throughout and I kept going back and forth between it.

There's SO many theories and additional nuggets of information though about the film and its content, I was up for HOURS last night reading them all and literally had to stop because there was just so many plausible things you wouldn't even notice the first time.