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.

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 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 makes a deal with the Russians to rescue Kate. Gabi struggles to make a decision about her husband. In 2004, Dmitry asks one last favor of Terrance. In 1972, the last pieces of the puzzle to understanding Martin Odum's identity are revealed.