Superman 4 has good ideas and good performances, but was ruined when the director cut 40 minutes from the film before release. Among other things, the denouement in which Nuclear Man defies Luthor and turns himself into a nuclear missile in order to spark World War III. In order to see what the film should have been, I suggest one seek out the DC Comic Adaptation. This film, as Christopher Reeve's final performance as Superman deserves to be restored for DVD. The reason for Superman using powers he has never had, was the result of unfinished effects. The great wall of China scene should have been finished by adding Superman fixing the wall at super speed, and finished with Superman sealing it with heat vision.