MacDonald "Mac" Gargan is a professional criminal and one of Adrian Toomes' potential buyers. In the wake of an encounter with Spider-Man, Gargan was arrested by the FBI and vowed revenge, seeking out new allies to help him kill Spider-Man.
Deal with Aaron Davis
During his criminal lifestyle, Gargan came into conflict with the CIA and NSA and piled up an extensive criminal record, which included homicide. During this period, Gargan briefly worked alongside Aaron Davis, although their partnership ended sometime before 2016, allegedly due to Gargan's dangerous nature, though Davis still kept tabs on him. Eventually, Gargan became affiliated with Vulture and planned to strike a deal with him on the Staten Island Ferry to buy new Chitauri and Ultron-based weapons from some of the Vulture's crew in secret.
Gargan met Herman Schultz onboard the Staten Island Ferry in order to purchase alien technology from Adrian Toomes' Crew, which he would then use for his own criminal plans. While Gargan was given information from Schultz about where to collect the weapons, he was unknowingly scanned by the Spider-Drone, which then relayed Gargan's criminal history to Spider-Man, who was watching the entire transaction from the rooftop of the ferry.
While Gargan sent one of his own men to meet with Randy Vale and check over the weaponry, Schultz handed over the keys to the van for him to transport the cargo. Before Gargan could take the keys however, Spider-Man used his Web-Shooters to snatch them away. Spider-Man attacked the criminals while the surprised Gargan pulled out his gun, but was knocked off the edge of the ferry by the webslinger. Spider-Man then used his webs to catch Gargan mid-air and leave him just barely hanging onto the ferry's edge.
Spider-Man then webbed up Shocker and subdued all of Gargan's allies. Despite holding on for dear life, Gargan was later knocked off of the ferry when Adrian Toomes attacked Spider-Man while wearing his Exo-Suit, smashing into a car that lurched forwards into Gargan, plunging him into the water. Gargan survived the impact, albeit left with severe injuries on his face and right arm. He was arrested by the FBI, who had set up a sting operation on the ferry.
Revenge on Spider-Man
Having been successfully apprehended by the FBI in the aftermath of the Ambush at the Staten Island Ferry, Gargan was then taken to jail. Later while walking along the corridors of the prison, Gargan smiled as he approached Adrian Toomes, who was also recently defeated by Spider-Man. Noting his surprise for being imprisoned together, Gargan had assured Toomes that the result of the fight with Spider-Man was not his fault.
Gargan informed Toomes that he blamed Spider-Man for his injuries and he had some friends from the outside who had come across the young hero and also wanted their revenge. Gargan revealed he heard a rumor that Toomes knows Spider-Man's identity. However, Toomes claimed if he knew who Spider-Man was, he would already be dead. The disappointed Gargan had seemed to accept this before watching as Toomes left to greet his wife and daughter who came to visit.
Gargan is a sociopathic and dangerous criminal, having been convicted of multiple homicides. His former partner, Aaron Davis, described Gargan as "crazy", which was the main reason Davis stopped working with him. Gargan is shown to hold a grudge, instantly plotting to brutally kill Spider-Man for his involvement in his imprisonment.
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- In the comics, Mac Gargan was a private investigator hired by J. Jonah Jameson to learn how Peter Parker managed to get such sensational photos of Spider-Man. Gargan later agreed to become the subject in an experiment which granted him superhuman powers similar to Spider-Man, although it also drove him insane, and he became the criminal known as Scorpion. Gargan would later be bonded with the symbiote, becoming the third incarnation of Venom.
- Gargan has a scorpion tattoo on his neck, referencing his comic book counterpart. This is also similar to his Ultimate Marvel counterpart who also had a scorpion tattoo on his neck to reference his mainstream counterpart.