The men come home but one is hurt. Holly is happy to have Tim home as he tries to adjust to life at home. Quincy’s army career could be over due to injury as his wife has to make money last. Gloria thinks her husband is gravely wounded goes to welcome back causing Patrick pain. Joan’s decision about the Army War College could end her marriage.
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The Machine becomes increasingly erratic because of the computer virus, and Reese and Finch must find an elusive tech millionaire. Meawhile, Carter puts herself at risk when she tries to find Cal's killer.
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The newest Number is a famous cardiologist, but by the time Reese gets to the man, it's too late: he's already been given a slow-acting irreversible poison. While Reese and the doctor try to track down the man who poisoned him, Carter has a tough decision to make when IAB moves in on Fusco for the murder of his partner a year ago.
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While Carter tries to determine if her boyfriend is working with HR or not, Finch infiltrates a tech corporation to determine if their new Number is trying to help the company or hurt it.
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Denise decides to watch some children for a few army wives and later has to deal with the trouble they get into. Jackie worries that Kevin may be going back to work too soon meanwhile Joan gets some orders that she may not like. As news of an explosion travels through Fort Marshall Denise must not only find out exactly what happened but try to provide some comfort and reassurance that everybody is OK.
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While Carter deals with corruption within her own department, Reese and Finch help an elderly gambler and try to figure out why the mob wants him dead.
The squad helps keep Rollins' beaten and pregnant sister safe from her dangerous boyfriend. Unfortunately, the lines they cross trigger yet another IAB investigation that jeopardizes the team and may cost a detective's job.
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As the FBI renews their hunt for Reese, he and Finch try to help a sister of a dead soldier seeking justice for wronged veterans.
Reese and Finch must track a cab driver whose Number has come up... but they don't know if he's involved or if one of his passengers may be the intended victim or predator. Meanwhile, Simmons continues to put pressure on Fusco.
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Reese must protect an investigative journalist without letting her know that he's around, for fear of blowing his and Finch's cover.
The wives get word that Fort Marshall will have a lot more room because of the joining with an air force base. Kevin believes the breakthrough he has could enable him to go back to his previous duties. The trips find out they have to redeploy early. Joan make a decision that could but will affect her career. Charlie and Nicole find another way they may be able to have children.
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Roxy and Trevor get ready to leave Fort Marshall; as Gloria returns to her duties at the Hump Bar. Sophie returns to find Kevin taken his anger over his handicap out on her. Roland is still in hot water over helping Marcus. Now Roland has to figure out why Joan is against it. Charlie wonders if she and Nicole will be parents.
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Kevin comes home with a lot of baggage that Jackie will have to deal with. Roland goes against Joan's wishes and begins to treat Marcus in secret. Trevor gets orders.
Roxy and Trevor argue over what he should do if he decides to leave the army early. Roxy's mom drops by. Jackie can't seem to control her daughter Sophie and is shocked at how easily her daughter can manipulate anybody. Denise's decision to become a nurse practitioner anchors frank. Nicole and Charlie hope Roland will do a favor for them. Gloria's marriages struggles take a sad turn, Roxy goes into labor.
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Claudia Joy decides to help army veterans with legal matters, Roxy to worries about the depression the Cody has fallen into due to family issues. Trevor is worries the about Hector and his marriage problems as well as the possibility that he might have to leave the division suggests that Hector and Gloria see a marriage counselor. Nichole's mom isn't happy when Charlie tells her that she and Nicole are engaged. Kevin makes a stunning decision in that leaves Frank to question his duties in Africa.
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Frank seriously questions whether he should continue being in the military due to what he sought in Africa. Michael finally gets the third star promoting him to core commander, but the third star could be in jeopardy after Audrey tells Claudia joy about how he got that third star.
Roland and Joan are not sure if they really want David to spend time with his biological father. Hector and Gloria continue to fight is about her working at the high bar until something happens to change Hector. Claudia Joy gets ready for her upcoming kidney transplant.
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The FBI close in on Reese, who is trying to protect a psychologist from one of her patients. Meanwhile, Finch receives a visit from an old friend.
Blair must make the big choice between Dan or Chuck; Lola reflects on Nate asking her to move in with him; Lily makes a final decision regarding her marriage.
Serena must be Blair's double when Blair finds herself needed in multiple places at once; Chuck enlists the help of both Ivy & Lola in order to carry out a revenge plot; Nate sorts out his future with Diana Payne.
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Roland meets Marcus who says he is David's biological father. Now Roland may have to face the possibility of having to give David back to his biological father. Michael finds out more information about an incident at an orphanage. Jackie Clarke gets into deep trouble with her addiction as the wives see if they can help her overcome her problem. Michael gets some news about his investigation regarding the 32nd division. Frank returns home troubled by what he sought in Africa.
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Diana and Jack have a deep dark secret; Chuck investigates to find out what is really going on; Dan gets an offer to study abroad in Rome.
Denise notices a change in Frank after returning home from Africa and she begins to worry about his mood change. Jackie may regret taking over the family readiness group duties by herself and wonders if she took on too much. Roxy and Trevor help a new family on the base with their money troubles. Tonya feels uncomfortable after bumping into Dr. Hansen while they were both in Africa and shared a kiss together.
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While questioning a man who prevented a bank robbery, White House and Jackpot come across a secret. Kenny's father makes an appearance at the precinct and the Shannon bar thug meets up with Lazarus again.
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Nicole is busy trying to find a peaceful resolution for the conflict in Narubu but trying to stop the fighting in that country proves to be a little bit too dangerous for her as they prepared to leave the country.
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The 23rd division is called to go to Africa where help is needed urgently. Tanya and another doctor work to save a wounded sergeant. Claudia Joy is back home dealing with her medical crisis, while Denise and Jackie pay a visit to the family of the sergeant and welcome them to Fort Marshall. Roxie convinces a rather reluctant army wife to participate in the family readiness group to make other self feel comfortable at Fort Marshall.
Roland learns something about Charlie. Back in Africa the troops defend a medical clinic against a militia.
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Joan will be dealing with controversy involving her newly adopted son, David after he and a classmate get into an accident. The wives gather to support the family. The friendship between Claudia joy and Denise gets into trouble after the animosity between Jackie Clark and Claudia joy continues. Roxie and Trevor help a couple try to straighten them there relationship out.
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Reese and Finch learn that their new Numbers are the five Dons of New York City, and figure that Elias is making his move for complete control of organized crime.
General Clarke joins Fort Marshall and causes old wounds to reopen between Claudia Joy. Roxy is presented with a variety of opportunities with the possibility of Fort Marshall being combined with another base. Joan gets reprimanded for not considering combining Fort Marshall with other bases as a way to keep them open.
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Denise welcomes someone new to Fort Marshall Claudia Joy feels uncomfortable around her and confides about the uneasiness an old friend. Rowland gets an interesting opportunity at a youth center. Roxy has to adjust to the challenges that come with being an officer's wife.
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Pamela is having a difficult time adjusting to Chase's being away. Trevor is uncomfortable with the houseguests, an old friend of Denise's could cause trouble at the base.