Valerie works to obtain intel on the Far Right while Robert's teenage son Noah arrives in Berlin and asks questions. Meanwhile, Frost agrees to the Ambassador's request to spy on Berlin Station.
BB Yates's past is revealed while she juggles keeping Berlin Station's Far Right operation covert or revealing it to Ambassador Hanes; Daniel discovers a lack of trust between Otto Ganz and his daughter.
The Station's sting operation to catch the Far Right in an arms deal goes horribly awry, with Otto Ganz escaping. Meanwhile, Robert and Frost make plans to investigate the money trail behind the PfD's nefarious dealings.
Robert and Frost travel to Norway to investigate the illegal money trail leading to PfD; BB and Valerie devise a new plan involving a member of the Far Right; Daniel deals with the psychological consequences of his mission.
April weighs telling Robert about Hector's assassination plot; Daniel tries to arrange safe passage out of Berlin for Hector with help from Esther.
Hector is wanted by German authorities for the assassination of Katerina Gerhardt, but Berlin Station begins to discover there is more at play than a jaded ex-CIA officer.
Berlin Station continues to search for the truth behind Katerina Gerhardt's assassination and Nick Fischer's role in it, as a protest outside the US Embassy and calls to turn Hector over escalate.
Under the direction of new Chief of Staff BB Yates, Daniel Miller, Robert Kirsch, Valerie Edwards and the rest of Berlin Station embark on an unsanctioned operation to uncover a possible Far Right terrorist attack.
In a 24-hour episode set completely in Spain, Daniel uses Hector to further his mission with Otto, much to Hector's dismay.
Valerie Edwards sends Daniel Miller and Robert Kirsch on an urgent mission, where they meet renegade CIA Officer Rafael Torres, and uncover signs of a covert invasion.
Berlin Station follows up on the evidence Kirsch brought home from his mission, crystallizing their theory about a possible upcoming invasion.
The Station enlists Rafael Torres to track down a missing comrade's last known location, leading him to hostile territory. Kirsch visits an old friend.
Torres risks everything to bring a fallen comrade back to Berlin. April learns the true value of her asset's medical tech, and works with Sofia to track down the troll farm spreading disinformation in Estonia.
Kirsch and Torres follow a lead to Vienna, where they must risk their lives to secure their fallen comrade’s location. When B.B. Yates returns to Berlin, the Station must decide whether or not they can trust an emissary of the Oval Office.
Frost introduces Torres to an old friend, whose new identity helps them infiltrate the Russian elite. April and Kirsch work to initiate a hostage swap.
B.B. and Valerie attempt to amass support for an intervention. April’s assets face deportation. A dangerous figure invites Hector and Torres into dangerous territory.
Daniel and Hector find themselves needing to escape a tricky situation to meet Frost for an exfil. Torres fights to maintain his cover and give his allies a leading edge.
A powerful figure’s fall from grace makes way for his ruthless successor to take the reins Estonia, where a cyberattack has blacked out the entire country in advance of the ground invasion. In turn, all of Berlin Station must try to take him down.
Mere hours remain before enemy forces topple the Estonian government and reclaim the country for Russia. Without Langley’s backing, Berlin Station acts alone in one final desperate push to prevent the fall of a nation.
