Sacha

Continuity mistake: When Lenny leads his car with the cops in, the car is facing a very short road ending in a small mount of rocks. The following wider angle shows a very wide open space with grass and a huge cliff.

Sacha

Continuity mistake: Behind where Nuclear Man lands there's no school bus on the wide shot, which is a matte painting, but a frame later one appears and stays there for the rest of the scene.

Sacha

Continuity mistake: When nuclear Man bursts the cab's hood, the radiator explodes and vanishes. A second later it's back on.

Sacha

Superman IV: The Quest for Peace mistake picture

Other mistake: When Clark Kent enters the subway, the set is the same as the rampage later in the film; only that the second time we see this set, the subway entrance has vanished.

Sacha

Superman IV: The Quest for Peace mistake picture

Visible crew/equipment: In the quarry, when the cops' car flies up the air you can see the ramp used to lift it on the lower left side of the screen.

Sacha

Continuity mistake: In the quarry, Lenny parks his car to the very right of two wagons. Seconds later the car is in front of them.

Sacha

Continuity mistake: When Lacy shows the mock front page of the Daily Planet she holds it covering the red circle on the top right. A frame later she's holding it several inches down.

Sacha

Continuity mistake: When Nuclear Man arrives to earth, full of energy from the sun, his footsteps don't glow; neither do they when he arrives to the balcony, several scenes later. Then a couple of seconds after they glow but stop glowing when he walks towards Superman and keep that way for the rest of the film.

Sacha

Continuity mistake: The Soviet missile has legible CCCP red letters, but in the following shot it's covered in snow, although the close-ups don't show any snow falling.

Sacha