 The scenes in which Superman straightens the leaning tower of Pisa  and then leans it back in the end were originally planned to be shot  for _Superman II (1980)_ (qv), as it was in Richard Donner (qv)s  original script for the first sequel. The closing shots of Superman  in space were lifted from _Superman (1978)_ (qv) and also reused in  _Superman II (1980)_ (qv) and  _Superman IV: The Quest for Peace (1987)_ (qv).