The Twilight Zone - The Gift

The residents of a small Mexican village, just 40 miles or so south of the Rio Grande, panic when they learn a being from another planet may have crashed near by. As the result of an altercation with local police, one policeman is dead and the alien is severely wounded. A young boy, Pedro, quickly forms a friendship with the alien who says he has come in peace. He also says he has a gift for the people of the Earth, but the villagers fear means that mankind will never benefit from the alien's generosity