Visible crew/equipment: When Superman and the super villain are fighting on the moon, when Superman flies in and lands at the beginning of the fight, you can see the cables that are suspending him.

Factual error: The Sun Man takes the publisher of the newspaper out into space. Humans cannot breathe in outer space. Even if they could, wouldn't she burn up in re-entry? It can't be Superman's powers are transferred to someone he's touching, otherwise in the second film he could never have crushed General Zod's hand...

Continuity: When Nuclear Man arrives on Earth, he enters a shady place which makes him loose 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. FX budget problems here?

Continuity: Two firemen are seen away from their truck, but when the angle changes six firemen have appeared seemingly from nowhere.

Continuity: Nuclear Man dents the floor with his footsteps, but in a wider angle the floor is intact.

Continuity: When Superman is walking with the kid towards the UN, they pass by a fire hydrant. In the immediate wide angle of the place the hydrant is gone, but reappears in the following shot a couple meters ahead of Superman.

Revealing: When Superman saves the people that Nuclear Man throws up into the air, as they lower you can see the support wires holding them up.

Continuity: When ever there is a shot of Superman flying taken from directly in front of him, on a bluescreen (Watch out for the oh-so-visible black outline and loss of colour), it's always the exact same shot. Obviously the producers could only get one day with the blue screen, then.

Continuity: 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: The shape and size of the volcano is totally different between the moment when Nuclear Man enters it, to when it erupts.

Continuity: When the truck is carrying the missile, the officers parading in front of it pass by the same place twice.

Continuity: When Superman lands Lex on the quarry, the standing position of the prisoner behind differs between shots.

Continuity: After the two police cars are sent backwards, a third one that was parked behind, suddenly appears aligned with the other two.

Continuity: 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: Before Superman enters the UN hall, the amount of people by the staircase changes between shots.

Continuity: When Superman leaves Luthor in the quarry, he lands several feet to the right of the cop. In the close-up they are almost close to each other.

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

Visible crew/equipment: After Superman is seen aged holding the green glass, Nuclear Man is seen ascending and wires are visible.

Revealing: Watch the moon fight between the two supermen. In one scene, Superman charges nuclearman and you can see the backdrops flutter if your monitor brightness is high.