Following the death of a 10-year old girl the intelligence unit have one option to gain access to their suspect, go on the inside. Ruzek and Atwater act as inmates to work the case from the inside. Outside prison, Voight and Olinsky follow-up on a good lead to answer some questions about the shooting. Meanwhile, Burgess and Roman show three boys around district thinking they are part of the Police Explorers program, only to realize that's not quite the case.moreless
Orchestra has completed a tracking system for all telekinetic signals, which puts Bo and her friends in imminent danger. Shanning starts a "suicide-mission" to make sure that Bo's signal will be hidden, but ends up in an impasse... Meanwhile Tate and Bo set some ground rules for their new father-daughter-situation.moreless
Agent Tolliver hears what happened with Willie at the school and uses it to blackmail Eli. Narcisse arranges with Maitland to kill Chalky.
Still grieving for his brother, Al, in a fit of rage kills a policeman. Rothstein and Margaret unexpectedly run in to each other, and Willie drops out of college, enraging his father.
Nucky loses confidence in Rothstein as a partner. Willie plays a revenge prank on a fellow student that goes woefully wrong, and Federal agents continue to close in on Nucky's business.
While visiting Tampa, Nucky finds himself attracted to a local bar owner. Willie tries to pinch some alcohol from Mickey's warehouse, and Richard's sister comes to his aid.
Van Alden is ordered to keep an eye on the Capone's. Dr. Valentin Narcisse arrives in town with nothing but trouble with him. Eddie demands a promotion.
Nucky reaches out to Joe Masseria after the battle with Rosetti. Gillian takes action to gain custody of her grandson. Eli's oldest son asks Nucky for career advice.
Detective Tutuola asks the unit to investigate when his ex-brother-in-law is arrested after attacking a priest. The in-law's criminal past has influenced the detectives on scene, and Tutuola believes he's innocent. SVU's investigation, however, unearths a church scandal just in time for Christmas.moreless
As Capone's cavalry rides in, the war starts: with firepower on the one hand and scheming to alienate Masseria from Rosetti, Nucky fights to get his business back and keep his life. Gillian takes on Gyp with her very own weapons, but sees herself overpowered; Richard poses as a one-man-army and seems to have more luck saving what's important. Meanwhile, Margaret has run off to face difficult decisions – not only about her unborn baby, but also about the future of her marriage.
Nucky doesn't get much time dealing with Margaret's affair when Gyp's men ambush him in the hotel. He flees with the wounded Eddie Kessler, and as there's nowhere safe to turn, it seems he'll be losing his last loyal man. With a price on his head, Nucky seeks refuge at Chalky's...
Gillian also has to suffer under Rosetti's willfulness when he chooses her club as a new headquarter, forcing her to lock Tommy in his room and finally even take measures against Richard, as she clings to her grandson against all common sense.
Rothstein asks Gyp to be his new supplier but has other plans in mind. Gillian worries about her business.
Chalky tries to help his daughter, Maybelle. Nucky's emotional state leads to Gyp getting the upper hand. Eli gets out of prison, and Margaret's concerns on the sanitary condition of the hospital are not taken seriously.moreless
Yoda's reminded of his days as a rookie when a drug lord he helped put away is paroled. Tony and Kenny find themselves raiding a house of prostitution. Ahmad and White House come to the aid of a charming con man who's on the run from a loan shark.moreless
With Nucky's trial right around the corner, Jimmy tries to make amends, but is it too late? Margaret makes a life changing decision and Van Alden flees to the Midwest.
Nucky heads to New York to hire a new lawyer after firing the last. After failing to get the black workers back to work, Jimmy asks Chalky for his demands and instructs Mickey to pay his debt to Manny.moreless
Nucky travels to Belfast in the hope of trading Thompson machine guns for Irish whiskey. Margaret receives some devastating news.
On realization that he might be losing control over Atlantic City, Nucky endeavors to discover which one of his men betrayed him. Rothstein puts Jimmy on hold in New York, with Lansky and Luciano still looking to do business. Dunn Purnsley gets more than he bargained for when he gets in Chalky's face in prisonmoreless