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History of character is unknown.
- This version of the character is exclusive to the continuity of the television series Batman: The Brave and the Bold and its tie-in video game and comic book series, Batman: The Brave and The Bold and All-New Batman: The Brave and the Bold. It is an adaptation of Thaddeus Sivana. The original character was created by Bill Parker and C.C. Beck and first appeared in Whiz Comics #2.
- Doctor Sivana was voiced by Jim Piddock.
- 3 Appearances of Thaddeus Sivana, Sr. (The Brave and the Bold)
- 1 Images featuring Thaddeus Sivana, Sr. (The Brave and the Bold)
- Quotations by or about Thaddeus Sivana, Sr. (The Brave and the Bold)
- Character Gallery: Thaddeus Sivana, Sr. (The Brave and the Bold)
This character is or was primarily an enemy of Captain Marvel, the Wizard Shazam, or any of the extended members of the Marvel Family. This template will categorize articles that include it into the category "Marvel Family Villains."