Crusader from Mars

Golden Age History
When Tarka murdered his rival in love, he committed the first felony on Mars in 50 years. The Martian governmnment branded him on his arm and sentenced him to exile. Together with his fellow criminal Zira, they were sent to Earth to rid it of crime. If they failed, then they would be destroyed--and so would Earth. Tarka took on the identity of Alan Wheeler, an FBI agent, with Zira as his secretary. They battled enemies such as the Black Hoods using futuristic weapons and their "disc-craft." Sometimes they were called upon by Mars to battle interstellar criminals as well, such as the Uralian Pirates.

Golden Age Appearances
Crusader from Mars #1-2

Tops in Adventure #1 (reprints Crusader from Mars #2)