Escape to Witch Mountain
Release Date: Friday, March 21, 1975
A brother and sister are placed in an orphanage after their adoptive parents die. They both seem to have psychic and telekinetic powers. Eventually they come to the attention of a millionaire who is obsessed with the paranormal and tries to capture and control them. They escape and more and more memories come back to them, and eventually they discover that they are not actually from Earth at all, but they are aliens from another planet, and they need to make their way to Witch Mountain where others of their kind are waiting for them.