1x13 - The Adventures of Superboy

When a flying saucer lands in the desert, the U.S. army prepares to destroy it. Superboy intervenes and asks them to wait. Superboy and Krypto head to the saucer. Upon seeing the powers of Superboy and Krypto, the aliens become convinced that all earthlings may have these powers. They decide to call off their invasion of the planet and head home.