Golden Globe nominee Julian McMahon (Nip/Tuck, Another world) will portray Rupert Boyce, an enigmatic American entrepreneur.
Daisy Betts (Shutter) has been cast as Ellie, an arts graduate engaged to marry Ricky Stormgren (Mike Vogel), the most influential human in the world.
McMahon and Betts join a cast that includes Emmy Award nominee Charles Dance (Game of Thrones) as Karellen and Mike Vogel (Bates Motel) as Rick Stormgren, along with Ashley Zukerman (Manhattan) as Jake Greggson, Osy Ikhile (Clap!) as Milo and Yael Stone (Orange is the New Black) as Peretta Jones.
Adapted for the screen for the first time ever from Arthur C. Clarke's beloved and influential novel, Childhood's End will premiere on Syfy in 2015.
Hailed as a revolutionary work of science fiction since its publishing in 1953, Childhood's End follows the peaceful invasion of Earth by the mysterious Overlords, whose arrival begins decades of apparent utopia under indirect alien rule, at the cost of human identity and culture which may ultimately threaten the very survival of mankind.
Childhood's End will be filmed in Australia.
Akiva Goldsman, Mike De Luca and Alissa Phillips are executive producers. Childhood's End will be adapted by Matthew Graham (creator of BBC's Life on Mars and Ashes to Ashes). Universal Cable Productions will be the studio.