I am trying to find out the name of a movie I saw in the mid to late 70's. All I can remember is the end of the movie. There was a man, a mummy robot and a baby robot living in space. The man was poorly and the mummy robot was really old and not working properly. The man and the mummy robot told the baby robot they were going out and they died in space. At the end the baby robot was watering his flowers and crying because he knew they were'nt coming back. It was the first movie that made me cry and I have wanted to know the name for years. Can anyone help me?