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Official Site: Marvel Comics

The Sinister Six are a group of supervillain appearing in Spider-Man comic books published by Marvel Comics. They are drawn from Spider-Man's list of enemies. The original incarnation of the group was organized by Doctor Octopus and consisted of Vulture, Electro, Mysterio, Sandman and Kraven the Hunter.

The Sinister Six first appeared in The Amazing Spider-Man Annual #1 (January 1964).

After suffering three defeats in a row from Spider-Man, Doctor Octopus is separated from his tentacle pack. After his tentacle pack breaks free and helps Doctor Octopus get out of prison, he contacts every known supervillain who had crossed paths with Spider-Man. Only Electro, Kraven the Hunter, the original Mysterio, Sandman, and Vulture respond. As none of the members are willing to relinquish the honor of killing Spider-Man themselves, they decide to challenge Spider-Man individually with the order in which they face him determined by a random drawing. The Sinister Six kidnap Aunt May and Daily Bugle secretary Betty Brant, holding them hostage in order to force Spider-Man to confront them. Spider-Man defeats the Sinister Six one-by-one, mocking their decision to battle him individually instead of as a team.

In The Amazing Spider-Man #334–339, Doctor Octopus recruits Electro, Sandman, Mysterio, and Vulture, along with the demonic Hobgoblin (since Kraven the Hunter had died) as part of his plan to take over the world. However, this was a trick, part of a larger plan by which Doc Ock alone would be the master of the world, by releasing a chemical into the atmosphere that would cause pain in anyone who attempted to use cocaine; he would then sell his cure for the chemical to the rich and powerful. Sandman, who at this point in his career had reformed and was blackmailed into joining, aids Spider-Man in defeating the Sinister Six, and ultimately stopping Doc Ock's plans to conquer the world. Because Octopus' chemical is eating away the ozone layer, Spider-Man has no choice but to release the cure into the atmosphere.

The Superior Foes Of Spider-Man has not been a contender in any CBUB matches.