Great sites
Mistakes
When the lava is flooding the village, a big green plant appears close to a priest. When Superman cools the lava and the smoke goes away, we see that the plant is much smaller and less leafy. See more...
Trivia
Near the end of the film, Superman gives a press conference in front of a bluish mirror-glass building which is meant to be the Daily Planet skyscraper in Metropolis (which we all know is New York, sort of). The shot is framed so you can only see the bottom of the building - necessary as it is only about 3 floors high, and is in fact the railway station in Milton keynes, England, about 400 yards from where I work. Even the crowd have a vaguely British look about them - presumably passers-by were recruited and stood there in their own clothes (this would matter less now - Brits look more American than they did in the Eighties). See more...
Superman IV: The Quest for Peace (1987) - 6 quotes
Directed by Sidney J. Furie, starring Christopher Reeve, Gene Hackman, Margot Kidder (add more)
Lex Luthor: He gets his energy from the sun. Without it, he's like you at night - useless.
Lex Luthor: Destroy Superman!
Nuclear Man: First, I have fun.
Lex Luthor: You know what I can do with a single strand of Superman's hair?
Lenny: You can make a toupee that flies.
Superman: You'd risk world wide nuclear war for your own personal financial gain.
Lex Luthor: Nobody wants war. I just want to keep the threat alive.
Lex Luthor: Lenny, let's try and keep your IQ a family secret.
Lex Luthor: Lenny, I've always considered you the Dutch Elm disease in my family tree.