The first human Captain Universe was an astronaut named Captain Ray Coffin. He battled Baron Karza and sealed the Prometheus Pit between the Microverse and Earth. Years later, the Uni-Power would possess his son Steve Coffin to battle Mister E and his shadow slaves. It next possessed identical twins Ann Stafford and Clare Dodgson to capture Nemesis, and then possessed small-time cat burglar Monty Walsh to stop mafia don Guido Carboni. It then possessed Doctor Strange and Commander Arcturus Rann to reinforce the space-wall between the Microverse and the Macroverse. It then possessed Bruce Banner for the first time, to defuse a nuclear missile, and wound up battling Banner's own alter ego the Hulk. Captain Universe was then next among the heroes summoned by the Grandmaster for the Contest of Champions. The Captain Universe power next possessed Delayne Masters to defeat schoolyard bullies. It then possessed Evan Swann to stop the Quantum Mechanic from destroying the Earth.