Jack and his brother, Drake, were members of Captain America's computer hotline network and they created a citizen's patrol group in their hometown, Sandhaven, Arizona. Drake was attacked by a couple of criminals and the attack left him unable to use his legs. After the attack, Jack and Drake discovered that the Serpent Society had infiltrated his hometown and they had attempted to contact the local authorities, but the Serpent Society had paid them all off. Jack was unhappy with this information so he began training in the martial arts and weight lifting so that he could fight the Serpent Society himself. He took on a disguise that he thought would make Captain America proud and began to fight crime as Jack Flag.

During a bank robbery, Jack intervened and stopped Rock Python and Fer-de-Lance (both of whom were members of the Serpent Society). Shortly after this, Jack attempted to infiltrate the Society, but King Cobra did not fully trust Flag. King Cobra sent him to rob a painting from Mr. Hyde, who severely beat Jack. While fighting, Flag was drenched in Hyde's chemicals and developed superhuman strength. After receiving his new powers, Flag easily defeated Mr. Hyde and retrieved the painting that he was supposed to steal for the Serpent Society. Before returning the painting to the King Cobra, Flag contacted Captain America's hotline and informed them that the Serpent Society was in Sandhaven. Impressed that he was able to defeat Mr. Hyde, Cobra tried out Jack as a new King Cobra. While Flag was undercover with the Serpent Society, Captain America, and his protégé, Free Spirit, showed up to aid Jack and defeat the Society. Jack followed Captain America and Free Spirit east, aiding them against ULTIMATUM, AIM, and Madcap. When Captain America believed he was dying, he charged Jack, Free Spirit, Fabian Stankowicz and Zach Moonhunter with maintaining his hotline.

Jack Flag later helped a girl escape a group of gangsters and was targeted by the new Thunderbolts for violating the Superhuman Registration Act. He was able to subdue almost all of the Thunderbolts team, but was stabbed in the spine by Bullseye while escaping, destroying his cauda equina and leaving him paralyzed. He was taken into custody and imprisoned in the superhuman prison code named "42", which resided in the Negative Zone.^[1]

War of Kings

Jack met by Peter Quill (Starlord) when Peter was sent inside "42" to negotiate the surrender of the facility to King Blastaar's forces, who were besieging the facility in order to use its portal as a gateway to Earth. Jack Harrison had been fighting off Blastaar for sometime as the new man in charge of "42", after the warden and guards retreated back to Earth and abandoned the prisoners during the Skrull Invasion. While confined to a wheelchair, Jack still commanded the respect and loyalty of the former super heroes and villains that now made up his army. Unfortunately, due to a betrayal by one of Jack's men, Skeleton Ki, the doors of "42" were opened to King Blastaar's forces who stormed the facility. Jack Flag and Peter Quill were surrounded when Peter's Guardians of the Galaxy team suddenly teleported in to save them. Jack Flag and Peter Quill escaped back to Knowhere, the Guardians of the Galaxy's headquarters, where Jack's spinal injury was healed by alien technology and his paralyzes cured. Jack didn't like the "cosmic stuff" but he was still a wanted man on Earth and decided to stay on for a while as a fellow cosmic adventurer.

The Thanos Imperative

Jack was onboard the spaceship when Thanos was resurrected and went on a rampage on the ship.

Powers and AbilitiesEdit

Powers

Chemical Mutation:Jack possesses various superhuman attributes as a result of being doused with the chemicals that Calvin Zabo uses to transform himself into Mr. Hyde. The chemicals, which have never been identified by name, have caused some degree of body wide augmentation to Jack's physiology.

Superhuman Strength: Zabo's chemicals have greatly augmented Jack's musculature, connective tissues and skeletal structure. As a result, Jack possesses superhuman strength sufficient to lift approximately 10 tons.

Superhuman Stamina: Jack's augmented musculature is more efficient than that of an ordinary human. As a result, his muscles produce less fatigue toxins during physical activity, granting him an undefined degree of superhuman stamina. Jack can, however, exert himself physically at his peak for at least several hours before the build up of fatigue toxins in his blood begins to impair him.

Superhuman Durability: Jack's fortified bodily tissues are tougher and more resistant to certain injury than that of a normal human. Jack is able to withstand impact and blunt trauma forces to a much greater degree than a human. For instance, he can withstand impacts, such as falling from a height of several stories, powerful concussive blasts, and being repeatedly struck by a superhumanly strong foe, that would severely injure or kill a normal human while sustaining little to no injury to himself. However, it is possible for Jack to be injured by bladed weapons or bullets composed of conventional materials.

Regenerative Healing Factor: Due to his augmented metabolism, Jack possesses a type of accelerated healing factor that allows him to fully mend mild to moderate injuries much faster and more extensively than a normal human. Jack's healing powers are sufficient to allow him to heal from slashes or punctures within minutes to hours and a broken bone within a matter of days. The full limits of Jack's healing powers aren't known but it is believed he is unable to regenerate missing limbs or organs. For instance, Jack has is hearing impaired in his left ear as a result of injury sustained as a costumed crimefighter and his healing powers have not mended the damage done to his ear. It is currently unknown if Jack can heal the damage done to his spinal cord since he has not been seen since his capture.

Power Grid ^[2]

Abilities

Prior to him being paralyzed, and even without his powers, Jack is a superb athlete and is skilled in a number of different martial arts.

Weaknesses

Jack's hearing in his left ear is severely impaired and, as a result of his battle with the Thunderbolts, he was temporarily paralyzed. His mobility has since been restored with the help of medical officials on the research station Knowhere.

ParaphernaliaEdit

Weapons

Jack employs technology designed by his brother Drake, once using a boom box which fired entangling rockets and disorienting fireworks.

LinksEdit

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Footnotes

↑ Thunderbolts #111
↑ Official Handbook of the Marvel Universe A-Z hardcover Vol. 5

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Wikia

Jack Harrison (Earth-616)

Contents

HistoryEdit