23-year-old Martin Rauch is sent to West Germany to act as a spy, gathering intelligence for East Germany's Secret Service.

Martin is ordered by Tischbier to steal a top secret security report.

While at a NATO conference in Brussels, Martin gets his first assignment: to seduce and bug the head security analyst’s secretary, Linda.

When the bug is found in Linda's desk, NATO is placed on high alert. Linda arrives to visit Martin, who scrambles to turn her loyalties around.

Martin is sent back to East Berlin, but is forced to deliver a seemingly harmless package to a mysterious man in West Berlin on the way.

Martin wants to stay in East Germany after returning for his mother’s kidney transplant. Alex Edel takes General Jackson hostage.

As preparations for NATO’s nuclear war game intensify, Martin receives an order from East Germany that cements his fears about their paranoia.

Fear of a pre-emptive nuclear strike against the West has become a very real possibility at the East German HQ.

Banished for his sins in 1983, Martin wallows in limbo until his Aunt Lenora conscripts him into her plan to drum up hard currency abroad.

Martin reluctantly agrees to help Lenora.

Gary Banks double-crosses Martin and Lenora, leading them headfirst into a proxy conflict at an Angolan oil refinery. Seriously injured in the fighting, Martin is abandoned by Lenora.

Badly injured, Martin wakes up in the Libyan desert, where he meets Samira and Khaled, and uncovers an imminent terrorist plot. Meanwhile, Lenora arrives at an Angolan hotel.

Brigitte tries to convince Martin to work as a double agent.

Martin returns to West Berlin.

Lenora returns to East Germany with Rose, determined to develop top-secret communication technology for the ANC in a secret operation called Operation VULA.

Martin has positioned himself for a trade back to East Germany but needs to prove his loyalty to the BND before they accept him as a double agent. Meanwhile, Tina is incarcerated in STASI prison with no idea where her family is.

Martin is finally able to return to the East and see his son for the first time.

Lenora is grounded and demoted after the cruise ship plan is uncovered.

Martin gets into a routine until he's approached by the HVA.

Various agencies vie for control of Martin, but Martin must find a way to keep Max safe. Brigitte Winkelmann and CIA agent Hector Valdez task Martin with infiltrating a group of West Germans. Lenora acts on her plan to get out of prison.

Martin is drugged by the West Germans and interrogated. Meanwhile, the KGB endangers his new love interest, Nicole, and Max. The West Germans rope Martin into traveling with them to Frankfurt. Lenora approaches Fuchs to access a weapons stash.

Martin realizes he needs to take care of Max and Nicole while figuring out what the group has planned in Frankfurt. He discovers he's in one of three terror cells involved in an assassination attempt and identifies Lenora as part of a second cell.

Realizing Lenora's involvement in a prominent banker's murder, Martin and Nicole chase her. Schweppenstette entraps a bank employee and brings Staatsbank to East Germany's side. Fuchs and Dietrich lay low in Italy and establish the HVA in exile.

Lenora heads to Italy to meet with Fuchs for help with her next plan. Tina can't let East Germany get away with killing Christoph. Martin faces off with Lenora and she tries to convince him to join in assassinating Kohl. Fuchs teams up with Valdez.

Martin is arrested and framed for Lenora's assassination plot. As Tina manages to overpower her interrogator, Tischbier is caught up in the fray. Valdez and Brigitte pull the threads of the Kohl assassination attempt. Nicole fears for Max's safety.

Martin is held and tortured by Valdez, who wants to force a false confession. Brigitte teams up with Schweppenstette to save Martin and faces off with Lenora. Nina and Fritz discover the HVA in exile and have a proposition for Fuchs and Dietrich.