Superman IV: The Quest for Peace

Superman IV The Quest for Peace is a 1987 American superhero film directed by Sidney J. Furie. It is the fourth and final film in the original Superman film series.

Superman saves a spaceship of cosmonauts whose ship was thrown off course by debris, then visits his hometown of Smallville as Clark. Now that his adoptive parents have died, Clark has inherited their nowunattended farm. In an empty barn, he uncovers the capsule that brought him to Earth, and removes a luminescent green Kryptonian energy module. A recording left by his mother Lara voiced by Susannah York states that its power can be used only once. Unwilling to sell the farm to a mall developer, Superman returns to Metropolis.After returning to the Daily Planet, Clark learns that the newspaper went bankrupt and has been taken over by David Warfield Sam Wanamaker, a tabloid tycoon who fires Perry White and hires his own daughter Lacy as the new editor. Lacy takes a liking to Clark and tries to seduce him. Clark agrees to go on a date with her. Following the news that the United States and the Soviet Union may engage in nuclear war, Clark is conflicted about how much Superman should intervene. After receiving a letter from a concerned schoolboy, Superman travels to the Fortress of Solitude to seek advice from the spirits of his Kryptonian ancestors. They recommend that he let Earth solve its own problems, or seek new worlds where war has been outlawed. After asking for advice from Lois Lane, Superman attends a meeting of the United Nations, announcing to the assembly that he will rid the planet of nuclear weapons. Various nations fire their nuclear warheads into space, which are collected by Superman into a giant net and then thrown into the sun. ........

Source: Wikipedia