The Bureau

Debailly is still under routine surveillance, whilst resuming his affair with Nadia under his cover identity Paul Lefevbre. He starts to question Nadias reason for being in Paris. Meanwhile, the DGSE hires psychologist Dr Balmes, and asks her to review his state of mind. Agent Gherbi is exfiltrated from Algiers after hearing about Cyclone, and Marina continues preparing for her mission. The episode closes with a brief scene of Debailly recounting his story while connected to a polygraph.

The episode starts with a flashforward of Debailly continuing to explain his story. Nadim investigates Paul Lefevbre, and tells Nadia not to see him again. But he finds them having dinner, and interrogates Lefevbre. Nadia confesses her true reason for being in Paris, and Debailly realises that their relationship puts her in danger. Meanwhile, Reza starts to flirt with Marina, and she has to rebuff his advances. DGSE tries to find out if the Algerians are holding Cyclone, and must stop his mother travelling there to search for him.

Debailly continues to investigate the leads on Cyclone. Nadim traces Debaillys daughter Prune and starts asking about him. Marina and another agent force a colleague at the Institute to refuse the secondment to Iran. Debailly realises that the Syrians and Russians are tailing him, and finally tells Duflot about Nadia and her involvement with the Syria talks. Meanwhile, the DGSE identifies who is holding Cyclone for ransom in Algeria.

Nadia refuses to betray her country, and is angry at Lefevbres revelations. Ill from the stress of her situation, she confesses to Nadim, and is flown back to Syria. The Russian FSB confronts DGSE and buys its silence. In Algeria, DGSE fails to plant a bug on the General holding Cyclone; Cyclone is handed over to ISIS. Marina is trained to deal with interrogation by Marie-Jeanne, tested by an Iranian agent pretending to be Rezas wife, and offered the Iran secondment. In flashforward, Debailly continues to talk to the CIA; the Americans do not fully believe his story.

Debailly asks DGSE to help Nadia, but is refused. He attracts the CIA by approaching the Syrians, purporting to represent the Americans, and takes time off to meet the CIA (revealed as the flashforwards shown from Episode Two). Dr Balmes suggests his motivation is not love for Nadia, but craving for the double life he experienced undercover. He agrees to return to the DGSE as a CIA double agent. Meanwhile, Marina disappears in Tbilisi en route to Iran, kidnapped by the Georgian secret service to see from where she seeks help. Cyclone is rescued in an ambush near the border with Mali.

Debailly recalls when he first met Nadia, and continues to agonise about her fate. The CIA confirms its interest in Zamani, but Debailly and Marie-Jeanne fall out over Marinas mission; Debailly persuades Deflot to replace her with him as Marinas handler. Debailly tells Marina to get close to Zamani. The Iranian secret police take an interest in Zamani and Marina. The French Government authorises action against Boumaza; Cyclone cultivates the jihadists family, and Sisteron poses as a supportive lawyer. Duflot continues to hunt for the mole inside the Bureau. Nadia is held prisoner in Syria.

DGSE receives a report that Nadia has been executed in Syria, but the CIA has warned Debailly to anticipate false reports, and agrees to work with him in return for his Iranian source. Marina is interrogated by the Pasdaran, then released, and she returns to Paris. Duflot tells Marina not to contact Zamani, who is coming to Paris, but Debailly then tells her to contact him again. Sisteron and the sister arrange to meet Boumaza on the Syrian border, where the Turkish military intend his capture. However, the sister is communicating secretly with her brother. Meanwhile, after a mock execution, Nadia is given her freedom, but forced to work undercover for the Syrian government representing its rebels abroad.

Boumaza takes Sisteron into Syria. DGSE decides not to attack, to protect its local agents. He hears that Turkish forces have his sister, and exchanges Sisteron for her, after cutting off his foot. DGSE ask Debailly back unofficially to lead a team to hunt Boumaza; he plans assassination using a suicide bomber. Duflot notices, from the GPS history of Debaillys phone, the weekend when it was untraceable (when he was with the CIA). He plants a bug in Dr Balmess office. Nadia, in Paris, is reluctant to continue her role, but Nadim forces her; she contacts the DGSE for help. Celine arranges for Nadia to meet Debailly. Meanwhile, Marina returns to Iran, tasked with recruiting Zamani. Debailly passes her reports onto the CIA.

Dulfot goes to interview Marina personally about how the CIA managed to recruit Zamani. Marie-Jeanne wants to exfiltrate Marina, but she is overruled. Zamani gets caught texting his handler from an Iranian government meeting; his arrest leads to Marinas. Meanwhile, Duflot questions Nadim about Lefevbre, but he sticks to the answers Debailly had briefed him to give. Marie-Jeanne questions Nadia. Debailly writes a farewell letter to his daughter. The DGSE identifies a German journalist with IS connections, as a way to reach Boumaza in Syria.

Duflot lectures his team about loyalty, then offers to resign, but his boss refuses to accept. The DGSE investigates Debaillys disloyalty and interviews his colleagues. Debailly takes the suicide bombers place as cameraman for the interview with Boumaza. In Iran, the CIA has agreed to trade one of its prisoners for Marina, but the Pasdaran try to kill her after encouraging her escape. However, she evades capture and is exfiltrated to France. In Raqqa, Debailly meets and kills the jihadist, but is himself captured and made hostage. Nadia opens the letter he left her, which expresses the same feelings about their love affair that she did, in the first episode of season one.

One of Debaillys jailers is a Russian FSB mole and offers to help him. Meanwhile, Duflot tries to help Marina overcome her trauma. Shahanah takes Nadia to meet Lely, a female intermediary for IS. Sisteron and Kurdish fighter Esrin are ambushed by snipers and she is injured, and flown to France for treatment. Sisteron suggests to Duflot that Esrin should be recruited in exchange for help with her sons education. Marina, plagued by panic attacks, resigns from the DGSE. The FSB mole is seriously injured in combat.

The CIA wants to bomb the camp where Debailly might be held, but DGSE insists they wait. Duflot wants to get Debailly released before he retires, but MAG reminds him that the agency doesnt normally make much effort to rescue disloyal agents. DGSE use Prune to pressure Nadia into agreeing to resume negotiations; Nadia meets Lely again and is given the hostage video. DGSE see that the points diagram has been altered to communicate that Cochise wants to defect. Duflot volunteers to go into the field and handle both cases himself. In Iraq, the FSB spy escapes into the desert with Debailly, with IS in pursuit. Meanwhile, Mossad persuades Marina to speak at a seismology conference in Baku. Simon, Marinas ex who works for DGSI, offers his help if she runs into trouble.

Debailly manages to escape into the hills, and seeks help from a farmer who betrays him to IS, and he is recaptured. French agents identify the area where he escaped, but arrive too late. In Baku Marina gives her presentation to the conference, and is offered a job there, which Mossad urges her to take; she agrees after consulting DGSE. She panics when asked to take a polygraph, but is trained by Mossad on how to pass. In Syria, Esrin takes Duflot to his clandestine meeting with Cochise; however, Cochise is followed across the river by two of his men.

DGSE mourns the loss of Duflot. Meanwhile, Mossad gives Marina the memory stick with the virus, which DGSE manages to copy before Marina successfully introduces it into the system. In Iraq, Cochise and his IS fighters take Debailly toward an arranged ambush with French special forces. Before they arrive, one of them becomes suspicious and stops the convoy; the CIA makes a drone strike on the support vehicle. Cochise is wounded in the fighting; the French forces arrive in time to rescue Debailly, who is put on a ship to Libya. The CIA insist on debriefing Debailly first; DGSE reluctantly agrees on condition that Dr Balmes does the interview. Later, Debailly escapes from the ship.

DGSE tracks Debaillys attempts to contact Nadia. Dr Balmes meets her, and explains how Debailly got her released from captivity. Debailly sets up a plan to meet Nadia in a hotel, contacting her via her assistants mobile, which DGSE is already monitoring for another operation. Meanwhile, Simon tells DGSE about Marinas call for help; he suspects she is being held in the hotel, and plants a microphone in her room. The agent is told that a Mossad team is coming to deal with her, which DGSE overhears. Marina is saved at the last minute when DGSE blow her cover. In Syria, the French pull out of helping the Kurds, but leave Esrin in place; she is killed in the fighting. In France, DGSE arrive at the hotel to apprehend Debailly, but Nadia warns him using their agreed code. Nadia is taken away, and Debailly disappears into the night.

Dumped by the DGSE, Malotru comes out of hiding and is quickly located by the Russian secret services. At the DGSE, Liz manipulates Sisteron to cause distrust between he and Marie-Jeanne. Meanwhile, Jonas begins to suspect that his mission might be hiding an ulterior motive: to ultimately eliminate the Jihadists he has been targeting.

While under intense pressure from the FSB to cooperate, Malotru is considering how to approach a cyber operations officer. Back in France, Marie-Jeanne seeks Mag’s advice, only to find out that JJA had coerced him to resign and that she could very well be next. Jonas hires an expert to infiltrate an Islamist financial network.

Under Karlov’s watchful gaze, Malotru initiates Ellenstein’s recruitment. At the DGSE, Sisteron suspects that Cesar is not ready to go on a mission and will not be able to hold his legend undercover. Back in Raqqa, still under Daesh’s occupation, Jonas and Jean-Paul join a battalion of Yazidi women to track down Iode 3.

Karlov asks Malotru to join the FSB in Moscow. In Paris, Sisteron and the entire Bureau must answer to an inquiry questionnaire on Marie-Jeanne, which JJA intends to use against her during the next board meeting. Meanwhile, Marina is resenting the way the Bureau is using Micha, afraid to once again leave a trail of destruction in her wake.

In Ukraine, Malotru arrives at the exchange location to get Marina. But on the way back, their convoy deviates from the route initially agreed upon by the DGSE, forcing him to warn Sisteron. Back in Paris, Marie-Jeanne quickly understands that Malotru’s life is at stake and confronts JJA and Ponte. Meanwhile, Jonas interrogates Iode 3 to try and prevent an impending terrorist attack in France.

On his way to Riga, Sylvain disappears at Moscow airport. Marie-Jeanne is in the Sinai desert. She must work alongside the Egyptian agent Ramsès.

Liz Bernstein and La Mule are quietly continuing their investigations to identify the mole in the service. After a few weeks of rest in Sologne, Marina finds her post in Paris. Sisteron is responsible for training Andrea on the computer programs used by Israeli hackers. Meanwhile, in Phnom Penh, Sylvain decided to collaborate with the group led by Véra. In Paris, his superiors questioned his ability to manage the danger associated with this mission.

At the DGSE, the work of JJA is carefully examined. Dsec is particularly interested in the way he manages Pacemaker, who is on a mission in Cambodia. In Cairo, Marie-Jeanne discovers that her hotel room has been bugged. Pacemaker is closely watched at work.

Mikhaïl Karlov receives a parcel with the USB key which Sylvain uses at work. Both surprised and worried, he tries to reach the young hacker and learns that the young man is on a mission in Seoul. Meanwhile, Alexis Bakatine, the head of security at the FSB, is continuing his investigation into the spy "Black September" in order to find out if Pavel is a double agent.

Marie-Jeanne presents her candidacy to succeed Michel Ponte as director of the service. An Uzbek tourist in Paris finds a weapon. Is he part of Mikhails revenge?