Spy intrigue surrounds a deep undercover agent with the ability to completely transform himself into a different person for each job, but he soon comes to question his own identity. Based on spy novelist Robert Littell's book.
Martin makes a deal with the Russians to rescue Kate in the series finale. Also: President Arsanov's plan for Kate progresses in Chechnya; Gabi contemplates what to do about her husband; and an understanding of Martin's true identity is revealed.
A threat on a summit is investigated by Martin and Nina, who search for Tamir's associate in present-day Prague. Elsewhere, two assassins spin a deadly plan into motion; Tamir's wife gives orders to Beslan; and Dmitry struggles to complete his mission.
Martin works for Tamir in present-day Prague. Meanwhile, Gabi confronts Blazek about his shadowy activity; Kate is held prisoner in the president's compound in Chechnya; and suspicions rise about Dmitry and Ilyana.
Kate goes missing in present-day Prague. Also, Martin makes a risky proposition; Gabi learns that Blazek may have dangerous ties to Tamir; Dmitry is threatened in 2001 Prague; and suspicions rise about Terrence.
Martin prepares Kate for a perilous mission in present-day Paris. Meanwhile, Gabi confronts intelligence agents in Prague; a vulnerability in Dmitry is discovered; and Alex is recruited for a distinguished position.
Kate is offered a deal by Nina and an M16 agent in modern-day Paris, to Martin's chagrin. Meanwhile, Ballard convinces the FBI to allow him to take down Martin; Ilyana is enlisted as an operative in 2001 Prague; and Terrence's secrets emerge.
Kate becomes a fugitive in modern-day Paris, so Martin puts her into hiding. Meanwhile, Ballard unearths information that could lead him to Martin, and Ilyana asks Dmitry for a dangerous favor in 2001 Prague.
Martin races against time in a search for Kate in Paris. Meanwhile, Dmitry discovers a key to getting close to Doku Zakayev in 2001 Prague, and Ballard gets swept up in a life-changing incident in 1991 Lithuania.
Martin makes contact with a woman who may be linked to his past. Meanwhile, Dmitry embarks on a mission in 2001 Prague to find a wanted war criminal, yet concerns rise that Dmitry may be going too far with his infiltration techniques.
Season 2 kicks off with Martin Odum hiding out in present-day London and searching for clues about his identity with help from a CIA agent (Kelly Overton). Elsewhere, an investigation is launched into a Russian gangster.