Doctor Thaddeus Bodog Sivana is a genius inventor whose specialty is combining animal and human genes to create mutated creatures. He often works with a group of evil scientists called the Science Squad, who share his passion for creating devices intended to destroy the world.
Dr. Sivana's scientific genius made him one of the wealthiest men in Fawcett City. However, his unethical business practices made him, as he observed, the man the media "loves to hate".
When an extramarital affair led to Sivana's wife leaving him along with their two children and Sivana's business empire collapsed after becoming implicated in the deaths of Billy Batson's parents, Sivana turned to a life of organized crime in various attempts of global domination.
During the year following the Infinite Crisis incident, Sivana was abducted to Oolong Island by Intergang, where he and many other "mad scientists" were allowed to live a hedonistic lifestyle while creating the inventions of their wildest dreams for Intergang's purposes. They create the Four Horsemen of the Apokolips and succeed in capturing Black Adam, whom Sivana then tortures for weeks, until Adam is freed by heroes storming the island.
Doctor Sivana used the city Sydney, in Australia, as a test trial for his new machine; the "Luddite", which sends a magnetic pulse that shuts down any piece of technology, from a cell phone to a car engine or a microwave oven, and renders it beyond repair. The pulse also wipes the human brain of advanced knowledge such as memory, reading or mechanical manipulation.
- Sivana appears in the Club 539 Nightclub in Gotham City.
- Sivana is an R&D vendor for Tech villains in the Hall of Doom Tech Wing.
- Doctor Sivana first appeared in Whiz Comics #2 (February, 1940).
- Doctor Sivana is voiced by Matt Hislope.
- Doctor Sivana is famous for coining the insult "The Big Red Cheese" to refer to his nemesis Shazam. The name refers to Marvel's cheesy heroism.
- Sivana is married to Venus Sivana and has four children; Magnificus Sivana, Thaddeus Sivana, Jr., Georgia Sivana and Beautia Sivana. Venus, Magnificus and Beautia are all stunningly beautiful while Georgia and Thaddeus take more after their father in terms of intellects and looks and often seek to assist their father in his various schemes.
- Sivana's corporation, Sivana Industries, provides many devices for various supervillains under the table. While originally an independent entity, the business has been acquired by LexCorp and now runs as a part of the larger company's scientific division.
|Villains||Black Adam - Doctor Sivana|
|Isis Bone Pile - Word of Power|
|Apparel||Aegis of Eternity - Black Adam T-Shirt - Captain Marvel T-Shirt - Divine Handwraps of the Goddess Isis - Doctor Sivana's Clever Glasses - Shroud of Anubis|
|PvE||Kahndaq (Raid) - Tomb of Isis|
|Justice Society of America|