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.

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.