Played by Vincent Price, the character was identifiable by his pale bald head and white and yellow suit.
He believes himself to be "the world's smartest criminal", and his crimes usually have an egg motif to them; he also includes egg-related puns in his speech and uses various egg-themed weapons.
Egghead was one of several characters created specifically for the TV series, alongside King Tut, Shame, the Siren, Chandell, the Bookworm.
The first, spelled Egg-Head, was an associate, along with bespectacled Fish-Eyes, of jewel thief Michael Baffle in Detective Comics #63 (May 1942).
[2] He was not very intelligent, and Professor Hendricks tricked him into thinking he was on a rocket in outer space to get him to reveal the location of Optik's hideout.