None.

Mild violence throughout.

A train is sabotaged by a group of robbers. It's driver is attacked. A man is thrown off the train. Two men fight, until they fall off the train and long way down from a bridge.

Lois Lane is almost shot, and tries to shoot back.

Several robbers throw tear gas at Superman and try to gun him down.

None.

None.

After a violent sabotage, Lois Lane is trapped in the runaway train several robbers try to destroy by any means.

Some very young kids may find the amount of mild violence kinda intense.