The unconscious Nova awakens and quickly attacks the Sphinx! The Sphinx is unfazed and resumes his analysis of the starship's computers. After completing his task, Nova's foe announces that he intends to assemble a crew and journey to Xandar!

Meanwhile, the Comet is searching the city for Nova. Unknown to the Comet, another super-hero, Crimebuster, is watching him. Crimebuster can't believe the real Comet is still alive and decides to test him.

Crimebuster uses the devices in his hover vehicle to try and capture the Comet. The Comet evades the devices but is snared by Crimebuster's unbreakable net! Using his energy powers, the hero escapes and is ready to blast Crimebuster out of the sky. The younger hero tells the Comet that he only wants to talk, not fight.

After landing his Crime-Pod, Crimebuster reveals his true identity to the Comet. The hero from the 50's is overwhelmed to find out that Crimebuster's his son, Frank Moore!

Frank reveals that he didn't die in the explosion which destroyed their house. The young boy couldn't find any survivors and swore to revenge his family's death. As a result, Frank Moore created the identity of Crimebuster! After a joyful reunion and explanations, the two heroes turn their attentions to finding Nova. Unknown to them, a shadowy figure is listening. The Comet uses his electron powers to lock in on Nova's particular energy wavelength. The two go in pursuit of their mutual friend.

Over in London, England, Nova has been following a ball of energy controlled by the Sphinx. Nova's foe has sent him on a mission to find someone and the young hero had no choice. The Sphinx has somehow taken control of Nova's body and led him to a rundown apartment. Inside, Nova finds a young man he immediately recognizes...Powerhouse!

The Sphinx has returned Powerhouse's memories and the two foes begin a fierce battle in the streets of London! Finally, Powerhouse absorbs a building's electrical energy and blasts it at Nova! The Human Rocket fights through his pain with every ounce of strength he has and knocks out his foe with an incredible punch!

The Comet and Crimebuster arrive to see Nova take down Powerhouse and congratulate their friend. Suddenly, a green beam surrounds the four and teleports them to the Nova Prime Starship. On board, the Sphinx hands Powerhouse his old costume and instructs him to read the star coordinates on the computer screen. The star-screen and the uniform restore all of Powerhouse's memories and he recalls who he truly is.

Powerhouse reveals that he is from Xandar! He had originally been on a space mission to inspect Zorr's starship, which was preparing to invade his homeworld. On his way back from his inspection, a comet collided with his spacecraft and it was severely damaged. He spent months drifting in space until Earth's gravity dragged his ship into the ocean. There, he was found by Condor and was manipulated by the villain.

Elsewhere on the Nova Prime Starship, a lower compartment opens on Crimebuster's Crime-Pod. The villain known as Diamondhead crawls out. He had heard the Comet and Crimebuster talking earlier and decided to sneak onboard. Now, Diamondhead realizes something very big is going to happen!