USA Network has rounded out the cast for its straight-to series drama Treadstone, an offshoot from Universal’s Bourne franchise. The Affair star Omar Metwally, Tracy Ifeachor (Quantico), Hyo Joo Han (W: Two Worlds), Gabrielle Scharnitzky (The Game) and Emilia Schüle (Berlin Station) join previously announced Jeremy Irvine and Brian J. Smith as series regulars in the drama from Heroes creator Tim Kring and Universal Cable Productions.

Written by Kring, Treadstone explores the origin story and present-day actions of a CIA black ops program known as Operation Treadstone — a covert program that uses behavior-modification protocol to turn recruits into nearly superhuman assassins. The first season follows sleeper agents across the globe as they’re mysteriously “awakened” to resume their deadly missions.

Metwally will play Mr. Edwards, a CIA agent who was ostracized by his colleagues after making a decision that left a fellow operative dead. His willingness to make the hard choice positions him as the most qualified agent for a stealth mission.

Ifeachor will portray Tara Coleman, an investigative journalist who has turned her back on her career after getting too close to a dangerous truth. Now she must put the past behind her to get to the bottom of an international conspiracy.

Han is SoYun, a wife and mother who must make difficult choices that compromise her quiet family life in North Korea after she starts to learn about her own secret past.

Scharnitzky will play Petra, a no-nonsense Russian patriot who has committed her life to her country but has deep-seated knowledge of Russian tactics that come into play when she is betrayed.

Schüle will portray a Russian KGB agent who will stop at nothing to promote the agenda of her motherland.

Kring executive produces with Ramin Bahrani, who will direct the pilot. Ben Smith and Jeffrey Weiner executive produce on behalf of Captivate and Dan Friedkin and Bradley Thomas will executive produce for Imperative Entertainment (All the Money in the World); and Justin Levy (Beyond) will executive produce.

Metwally has starred for the past three seasons on The Affair and will appear in season 5 set to air later this year. He also has recurred for the past two seasons on USA’s Mr. Robot. Metwally is repped by MGMT Entertainment, Innovative, and attorney Bruce Gellman.

Ifeachor recently ended her run as the co-lead in John Strand’s political Off-Broadway play The Originalist. She will soon appear in indie feature Confetti, alongside Amy Irving and Zhu Zhu. Ifeachor is repped by APA, NB Management, VanderKloot Law, and The Artist Partnership.

Han received both the APAN Star Award and MBC Drama Award for Best Actress for her role in W: Two Worlds. She most recently appeared opposite Kang Dong Won in features Golden Slumber and Kim Jee Woon’s Wolf Brigade. Han is repped by BH Entertainment and attorney Scott E. Whitehead.

Scharnitzky’s credits include BBC’s The Game and Bonekickers opposite Hugh Bonneville and Julie Graham. She will also appear in the upcoming series Devils opposite Patrick Dempsey. She is repped by Crawford Talents.

Schüle, the German voice of Astrid in How To Train Your Dragon, will appear in the upcoming films Traumfabrik and Narziss und Goldmund, as well as the upcoming TV movie Die Vergesslichkeit der Eichhörnchen. Schüle is repped by Spielkind and Olivia Bell Management.