Continuity mistake: After Clark reads the 'Drop Dead' cover, he stands up and walks down the newsroom, all puzzled. The number of people and their positions has no continuity at all between shots.
Continuity mistake: The same man next to Lois on the train is standing on the platform a second later.
Continuity mistake: After the "Drop dead" cover, Jimmy Olsen talks to Lois. In the close-up of Lois while she says "He looks like my father," the journalist behind her is standing up. An instant cut later, he is seated.
Continuity mistake: Nuclear Man dents the floor with his footsteps, but in a wider angle the floor is intact.
Continuity mistake: Two firemen are seen away from their truck, but when the angle changes six firemen have appeared seemingly from nowhere.
Continuity mistake: When Nuclear Man arrives on Earth, he enters a shady place which makes him lose his power and cools his body, producing some frozen-like smoke. The next two times that he enters a dark place (inside the elevator and in space) he doesn't produce the smoke.
Continuity mistake: When Superman is walking with the kid towards the UN, they pass by a fire hydrant and one can see the street ahead is empty. A shot later another hydrant suddenly appears but the white benches disappear.
Suggested correction: The fire hydrant in question is actually two. The one they first pass is slightly faded with chipped paint. The next shot you see a different one that is fully painted red. The next shot shows the crowd passing the first hydrant seen.
Continuity mistake: The shape and size of the volcano is totally different between the moment when Nuclear Man enters it, to when it erupts.
Continuity mistake: After Superman straightens the US flag, a brief shot shows he is on a plain ground, but when he is knocked down by Nuclear Man, a big mount appears in front of him.
Continuity mistake: When Lacy is in outer space grabbed by Nuclear Man, she slides down dramatically and grabs on his wrist. Half a second later, the sliding effect is gone and she is now floating relaxed, grabbing the upper part of his arm.
Continuity mistake: Mr. Warfield asks the little boy to repeat "I wish Superman had said yes" and places his hand on the kid's shoulder. The shot changes inmediately to a close-up and the arm and hand are gone.
Continuity mistake: While the people in the village are watching the lava flow down the streets, the first shot shows them to the right of a wooden door. A frame later they are positioned several feet further, close to a big green plant.
Continuity mistake: When Nuclear Man buries Superman, there's a huge rock near the hole. When Superman comes out, the rock has disappeared.
Continuity mistake: When in the subway, Superman is standing by a 6 foot poster of the Statue of Liberty. When the shot changes to a flying Superman, he is a third of his size and the poster is huge.
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.
Continuity mistake: Clark enters the barn to fiddle with his green crystal. When he exits, a huge amount of stuff from his childhood has magically appeared around the place.
Continuity mistake: The close shot of the Great Wall exploding shows an edgy architecture, with straight lines. The wide shots show a curvy construction.
Continuity mistake: After Superman lets go off the elevator on the surface of the moon, the cables fall down with the elevator, but in the close-up the cables are up and fall down again.
Continuity mistake: A couple walks behind the hot dog stand in the same direction twice in less than half a second.
Continuity mistake: In the barn, Superman puts a glowing crystal inside a pocket. A frame later it disappears.