Additionally, Michelle Forbes (The Killing, True Blood) has joined the ensemble.
Armitage will play the starring role of Daniel Meyer, the cerebral, newly-anointed CIA case officer who goes from being an analyst at Langley to an undercover agent in Berlin tasked with finding an informant. Forbes, meanwhile, will portray Valerie Edwards, the no-nonsense administrator who serves as a Berlin Station Section Head.
The pair join previously announced cast members Richard Jenkins (Olive Kitteridge) and Rhys Ifans (Elementary).
Best-selling spy novelist Olen Steinhauer will pen the series and serve as an EP alongside Michaël Roskam (Bullhead, The Drop) and showrunner Brad Winters (Dig, Boss).