Syfy's Superman prequel series "Krypton," set generations prior to the planet's infamous destruction, has revealed cast of characters. The series, which was ordered to pilot in May, will focus on the family trees of two prominent Kryptonians. TV Line has the breakdown of the series' cast.

Seg-El, described as "athletic, quietly confident" man in his 20s. He's also the father of Jor-El, making him Superman's grandfather. The character also has roots in the comics; he appeared in 1999's "Starman" #51 -- an issue that was co-written by "Krypton" executive producer David S. Goyer. More of Superman's ancestors will be included in the show: Seg-El's father Ter-El and Seg-El's grandfather Val-El. Val-El is described as having "defied death by going into the Phantom Zone" and also believes in exploring space.

Another prominent Kryptonian family will appear in the series. Lyta Zod and Alura Zod will appear on the show, most likely ancestors of the Superman villain General Zod. Lyta is a "twentysomething beauty" and a reluctant warrior. Her mother is Alura, although details about remain unknown.

Classic comic character Dev-Em will appear in the series as a "chiseled, twentysomething bad boy." Dev-Em's been a supporting Superman character since the '60s and was once offered a membership in the Legion of Super-Heroes.

Set two generations before the planet's destruction, the project centers on the Man of Steel's grandfather, whose House of El was ostracized, as he fights to redeem his family's honor and save his world from chaos. "Krypton" has been in development since at least late 2014.

The sci-fi drama from David S. Goyer centers on Superman's grandfather. Goyer, who wrote the pilot with Ian Goldberg, is set to executive produce. Hailing from Warner Horizon Television, the "Krypton" pilot will be directed and co-executive produced by Colm McCarthy ("Peaky Blinders"). "Sleepy Hollow" veteran Damian Kindler will serve as showrunner.