DC Database

Thaddeus Sivana, Jr. is the son of criminal mastermind Doctor Sivana, whom he hoped to follow in his footsteps.

He was a member of the W.O.R.M.S.. Like the rest of the members, he was arrested by the Super Friends after W.O.R.MS. leader Lex Luthor called them under the ruse as a chance for his comrades to showcase their technology.[1]


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Justice League Villain

This character has been primarily an enemy of the Justice League, in any of its various incarnations. This template will categorize articles that include it into the category "Justice League Villains."