The history of Eugene "Flash" Thompson of Earth-78127 mirrors that of his Earth-616 counterpart until the point where there was a public exhibition on radiation that would irradiate a spider. In this reality, Flash Thompson would attend the exhibition along with Peter Parker. Flash's attendance would lead to Thompson being bitten by the spider instead of Peter Parker, and gaining the proportionate abilities of a spider.

Heading home with his dates, he would save the two girls from an out of control car by using his spider-strength to toss them out of the way. Dismissing how fantastic the scenario is they would happen to pass by the arena where Crusher Hogan would be challenging people to last three minutes in the ring with him for a $100.00 prize. Taking the bet, Flash would battle Hogan and not used to his superior strength would accidentally kill the wrestler. When the police would attempt to arrest him, he would flee capture and realize he has other powers such as super-human agility and the ability to cling walls. Wanted by the police and realizing that everyone know who he is, and guilt ridden for killing an innocent man by accident, Flash Thompson would decide to take up a costumed identity and fight crime as Captain Spider.

He would clash with such foes as The Chameleon and the Tinkerer and easily put them to justice. Peter Parker would grow an interest in Captain Spider and follow his exploits. During Captain Spider's attempt to stop the thefts of the Vulture, Captain Spider would die in combat when the Vulture would carry the Captain high into the air and drop him. With no means of stopping his fall, Captain Spider would fall to his death, and his body found by Peter Parker. Unmasking Captain Spider as Flash Thompson, Parker would curse Thompson for being a glory hog and that it took more than just super powers to be a hero.