Dru-Zod is a megalomaniacal Kryptonian, in charge of the military forces on Krypton. He knew Jor-El, Superman's father, when Jor-El was an aspiring scientist. When the space program was abolished after the destruction of the inhabited moon Wegthor (engineered by renegade scientist Jax-Ur), he attempted to take over Krypton. Zod created an army of robotic duplicates of himself, all bearing a resemblance to Bizarro. He was sentenced to exile in the Phantom Zone for 40 years for his crimes. Zod was eventually released by Superboy when his term of imprisonment was up. However, he attempted to conquer Earth with his superpowers acquired under the yellow sun.