Carrie is called back into action because an informer will only speak to her about an attack. Brody is sounded out about becoming the running mate of a Presidential Campaign. He is then asked to steal names from David Estes' safe by Abu Nazir.
Carrie makes contact with Fatima and hears that her husband is meeting with Abu Nazir. Carrie convinces Saul that this is real and American forces are put in place to assasinate him. The Vice President lets Brody sit in the room in the Pentagon as the mission takes place and he warns Nazir. Carrie insists on rummaging around Fatima's house even as angry men in the street attack the escape car. Brody is asked to look into Walker's death by his fellow marines.
Saul is searched at Beirut airport but sneaks by with his intelligence in tact. He heads direct to Carrie's house to tell her she was right. In the meantime she anxiously heads to Langley for the debrief and is upset to be excluded. She heads back to her apartment and decides to commit suicide. Brody is called to go and hide the tailor who made his explosive vest. The tailor is freaked out and tries to escape when they get a flat tyre.
Saul tells Davis about Brody and they create a small team to keep tabs on him. David's man Quinn rubs Carrie the wrong way but they agree that she should provoke Brody into contacting his handlers. Brody calls Carrie and she thinks she has given away something and so confronts him with the truth. Meanwhile Dana makes out with Finn and tells him that she will think about breaking up with Xander. Lauder and Mike begin to question whether Brody and Walker were working for the CIA.
Quinn begins interrogating Brody but snaps and stabs him in the hand. Carrie then takes over and uses her intimate knowledge of him to get the truth of what happened with the suicide vest. Meanwhile Jess worries about where Brody has gone and Dana and Finn have their first date.
Dana feels guilty over what she and Finn did and heads to the hospital. There she finds the woman they ran over and meets her distraught daughter. Carrie asks Brodie to talk to Roya to help flush out who the man is she met with earlier that day. Brody tells Quinn about the tailor he killed and the CIA team begin a thorough search of the shop. Mike realises that Brody killed Tom Walker and David and Saul corner him to tell him to back off.
At a wealthy donor's house tensions bubble between Dana and Finn until she admits what they did. The Walden's want to keep everything quiet while Brody and Jess feel they should be honest. Brody is trapped between needing to stay close to Walden, keep Roya on side and please the CIA. Meanwhile Saul goes to see Eileen in prison to ask if she knows who Roya's contact is. She says she does but will only tell if she can have a room with a view.
Dana turns to Mike to give her time to figure out what to do. She goes to visit the girl whose mother she killed and receives an angry welcome. Brody tells Roya that he quits and Carrie whisks him away to a motel to stop him from giving up altogether. The next day he calls Roya to tell her that he’s changed his mind. She takes him to the middle of nowhere where a helicopter comes to pick him up.
Saul investigates who Quinn really is and is confused by the answers. Brody reappears and tells the CIA everything which Nazir told him. An attack on the Vice President is thwarted but Nazir isn't captured. Jess and the kids are taken to a safe house by Mike.
Nazir kidnaps Carrie and asks Brody to get him the serial number of Walden's pacemaker. Brody heads out while Finn comes to talk to Dana about his guilt. Saul asks further questions about Quinn's real purpose and is taken for questioning as a result.
Carrie is convinced she saw Nazir in the building but the FBI teams can not find him. She returns to Langley and interviews Roya who dismisses her attempt to empahtise with her. However Carrie thinks hard about what she says and returns to the site and finds Nazir. He is shot by the FBI team and Brody cries at the news. Brody and Jess agree that their marriage is over. Saul is interrogated and gives Estes enough information to have him dismissed.
Carrie and Brody go back to the cabin and talk about being together. She is being forced to choose between him and the CIA and Saul thinks she's crazy for considering it. Quinn tells Estes he won't kill Brody because it only serves Estes. Saul oversees Nazir's burial at sea while Brody and Carrie attend Walden's CIA memorial. She chooses Brody and while they skip out explosives are placed in Brody's car and blow up the memorial. Saul is in charge of the CIA now and Carrie rushes Brody to the border as Nazir's replacements release his original confession video.