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Krypton Adds Game Of Thrones Actor As Jax-Ur

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Hannah Waddingham (Game of Thrones) is joining Syfy’s Krypton in the recurring role of Jax-Ur, a character who in the comics has been traditionally male.

Here’s how the TV version of the character is described:

Formerly one of Krypton’s greatest scientists with deep ties to Krypton’s past, Jax-Ur is now determined to bring radical change to Krypton as leader of the underground terrorist organization, Black Zero.

Hellboy’s Ron Perlman voiced the character of Jax-Ur in Superman: The Animated Series. Mackenzie Gray played the role on Man of Steel. Classic “Jimmy Olsen played the similarly named Dax-Ur on Smallville.

Krypton is a 10-episode drama premiering on Syfy March 21. The showreveals a chapter of the DC Universe that has rarely been told. Years before the Superman legend we know, the House of El was shamed and ostracized. This one-hour drama follows the Man of Steel’s grandfather as he brings hope and equality to Krypton, turning a planet in disarray into one worthy of giving birth to the greatest Super Hero ever known.

The series stars Cameron Cuffe, Georgina Campbell, Shaun Sipos, Elliot Cowan, Ann Ogbomo, Rasmus Hardiker, Wallis Day, Aaron Pierre, Blake Ritson and Ian McElhinney.

About the author

About the author

Craig Byrne

Craig Byrne has been writing about Superman TV since 1995, when the "Lois & Clark Krypton Club" launched. He founded KryptonSite.com in February 2001, becoming the first fan site for The WB/CW television series Smallville. He also wrote the Official Companion books for Smallville seasons 4-7 as well as the Smallville Visual Guide.

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About KryptonSite

In a time before social media, Craig Byrne created KryptonSite as the ultimate fan destination for The WB/CW series Smallville which starred Tom Welling, Michael Rosenbaum, Kristin Kreuk, Erica Durance and more. In the decades since, KryptonSite has grown to cover newer Superman-related TV and movie projects while still always holding on to Smallville.

The web’s first source for Smallville news, continuing to cover Supergirl, Superman & Lois, the new Superman films and more!

Copyright © 2026 Craig Byrne & KryptonSite and the respective original authors of posts. Smallville, Kryptonite and other Superman-related items are the property of DC Comics. No infringement is intended.

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