OK. Ending. The film is about forgiveness - of others, but most especially of oneself. Go to scene with Indian janitor in hospital and check what she writes on his palm. So . . Earth 2 Rhoda makes the trip to Earth 1. She appears as Rhoda would have appeared if the accident hadn't happened; put together, confident; means that the ploy worked and that John did find his family intact on Earth 2. E2 Rhoda takes two steps forward before screen goes to black - it leaves you with the sense that she's going to hug and forgive her Earth 1 self. Actually a positive ending about getting past self loathing and self destruction and living again.