Over the years, Doctor Octopus has become one of the most identifiable members of Spider-Man's rogues gallery. Doctor Octopus formed the original Sinister Six to fight Spider-Man after taking Betty Brant and May Parker hostage. He has led subsequent Sinister Six groups and usually takes offense when someone else leads the team. Disguised as the Master Planner, he organized theft of atomic equipment. After he stole a formula that Spider-Man needed to cure his Aunt May, Spider-Man tracked Doctor Octopus' gang to their base. In the ensuing fight, Spider-Man became trapped underneath a collapsed building. Seemingly doomed, Spider-Man was ultimately able to draw upon the sheer force of his will to summon the strength to escape. It is later revealed he used a scuba tank to escape.