Superboy (Kal-El) is a native of the planet Krypton, the son of Jor-El, Krypton's most brilliant scientist and inventor, and his wife Lara. Finding evidence that the planet is about to be destroyed, Jor-El fails to convince the ruling Science Council, so he conducts tests with model rockets to enable his own family to escape. His tests meet with mixed success. In one experiment, Kal-El's pet dog Krypto is lost when a test rocket carrying Krypto is knocked off course by a meteor.