Ambitious gang leader Thomas Shelby recognizes an opportunity to move up in the world thanks to a missing crate of guns.
Thomas provokes a local kingpin by fixing a horse race and starts a war with a gypsy family; Inspector Campbell carries out a vicious raid.
Thomas schemes to get closer to Billy Kimber at the Cheltenham races, and considers an offer from IRA sympathizers to buy his stolen guns.
As his war with the Lee family escalates, Thomas harbors suspicions about his brother's fiancée; Campbell pressures the gang to deliver the guns.
Thomas deals with an IRA chief bent on avenging his cousin's death; Grace must decide whether her loyalties lie with Campbell or Thomas.
Thomas prepares to oust Billy Kimber from power, but family secrets that come to light and the obsessed Campbell may prove his undoing.
When Birmingham crime boss Tommy Shelby's beloved Garrison pub is bombed, he finds himself blackmailed into murdering an Irish dissident.
After murdering an Irish dissident, Tommy has no choice but to be a pawn in Inspector Campbell's treacherous political game.
After joining London crime boss Alfie Solomons in a business venture, Tommy worries that Alfie's newly revealed volatility could pose a problem.
The Peaky Blinders take over London's Eden Club; Sabini convinces his old adversary Alfie Solomons to join forces and eradicate the gang.
The Peaky Blinders are under attack. Tommy's power base in London is obliterated, and both Arthur and Michael are arrested and imprisoned.
Tommy plans to execute the mission given to him by Campbell: the assassination of a high-ranking member of the military establishment.
On Tommy's wedding day, a new business partner arranges a secret transaction. Arthur has found a godly woman, and Polly meets an attractive man.
A careless threat sparks a war. Tommy gets a rare form of payment, but his bosses flex their power to keep him in line. Polly commissions a portrait.
Tommy travels to Wales seeking absolution, and uncovers a traitor in the Economic League. Michael develops a taste for guns. Arthur gets good news.
Polly goes to confession, igniting a chain of events that reveals a trap being laid at the Shelbys' expense. Tommy plans an exit from dirty business.
Realizing he's being outmaneuvered by the Russians, Tommy seeks help from a former business partner. Polly's new friendship becomes something more.
As Tommy prepares to commit the most audacious crime of his career, an unexpected blow forces him to face his worst fears in a race against time.
Grave news from the U.S. sends the Shelbys to an urgent board meeting. Ada hides a secret. Tommy is revisited by his past, in the form of a journalist.
The anonymous messages take a terrifying turn. Michael's loyalties are called into question. Tommy receives an offer from Oswald Mosley.
Aberama heads to Glasgow to get revenge. Mosley blackmails Tommy, who decides to turn the tables on him. Frantic to find Linda, Arthur loses control.
Tommy calls a truce and meets with Jimmy McCavern. A lucrative business opportunity presents itself. Aberama is asked to put love before revenge.
At the party, Mosley makes a speech. Ben Younger faces unexpected consequences for reporting Tommy's intel on fascists. Tommy visits an asylum patient.
At a family meeting, Michael makes a bold proposal. The mole is identified. Tommy asks an old rival for help with his plan to take down Mosley.
At Christmastime 1925, members of the fractured Shelby family get word that the New York Mafia is coming to avenge murders they committed a year ago.
Reeling from their loss, the Shelbys gather in Small Heath, where Tommy calls for a family truce in order to launch an offensive against the Mafia.
Linda tries to distract Arthur, who later gets caught in an ambush. Tommy is reminded of who he was before the war. Polly meets a man from her past.
The Mafia tries to lure one of the Shelbys into a trap. Tommy is visited by an old flame. Lizzie receives unexpected news.
Despite being outnumbered, Tommy starts a shootout with the Mafia. Luca Changretta approaches Alfie Solomons. The British military seeks out Ada.
During the boxing match, Arthur follows a hunch. Tommy is inspired by some words of wisdom from Alfie Solomons and gets valuable intel from Jessie.