Leader: Egghead
Members: Whirlwind, the Scorpion, Moonstone, Tiger Shark, and later the Shocker, Beetle, and Radioactive Man.

Looking for accomplices to aid him in his criminal ventures, Egghead broke Tiger Shark, Whirlwind, the Scorpion, and Moonstone out of prison. However, before they could be of much use to him, Whirlwind sneaked away to get revenge upon the Wasp himself. The others followed to try to keep him out of trouble, but they all ended up in combat with the Avengers and lost. Egghead freed Tiger Shark and Moonstone, but replaced Whirlwind and the Scorpion with the Radioactive Man, the Beetle, and the Shocker. Egghead sought final vengeance on his long-time enemy Henry Pym and sent the Masters of Evil to free him from the courtroom where he was being tried for certain crimes Egghead had framed him for. Egghead hoped to make it look as if Pym were a member of his criminal group in order to coerce Pym into working with him on a longevity serum. Pym pretended to go along with him but instead invented a device enabling him to defeat Egghead and virtually all the other Masters single-handedly. Egghead was killed when an arrow shot by Hawkeye caused a gun he was aiming at Pym to misfire.

First Appearance: AVENGERS #222