December 1925. When Tommy receives a mysterious letter on Christmas Eve, he realises that the Shelbys are in danger of annihilation.

As the Shelbys come to terms with the shocking events of Christmas Day, Tommy endeavours to unite his family and a bold new enemy makes his move.

Tradition weighs upon Arthur as Changretta finds a chink in the Shelby armour and Changretta continues to plan ways to continue the vendetta in the most devastating way possible.

The Peaky Blinders are lured by the Italians into a cat-and-mouse chase on the streets of Birmingham. As his factory lies idle, Tommy confronts the possibility that the Communists might win and he will be deemed a traitor to his class.

Tommy finds himself engaged in bloody battle with Luca Changretta and his gang. Lizzie has even greater news to break. Meanwhile, an army colonel has questions for Ada about her past as a communist, and Jessie Eden confirms just how far she is prepared to go in pursuit of her cause.

It is the night of the big fight - Bonnie Gold versus Goliath. But as the bell rings and the crowd goes wild, dangers lurk in the shadows for Tommy Shelby and his family. When Changretta plays his final ace, he sets in motion a series of events that will change the Peaky Blinders forever.

1929 – While his family deals with the repercussions of the Wall Street Crash, Tommy Shelby MP faces new dangers from unexpected quarters.

The Peaky Blinders come under fire when Tommy finds danger on his doorstep and a friend is brutally attacked. Could there be a traitor in the Shelby family’s midst?

As the charismatic Mosley shows his hand, Tommy prepares to make a treacherous new alliance.

Tommy agrees to dangerous new partnerships when a golden opportunity presents itself, and a Shelby party promises fireworks.

As Tommy reveals his intentions for Mosley, someone close to the Shelbys is targeted.

News of Tommy's activities have reached Winston Churchill. At a family meeting, Tommy lays out his plans for Mosley, which will take place at a rally Sir Oswald is leading. Tommy is surprised by another strategy, coming from an unexpected corner. Meanwhile, Tommy has his own secrets to reveal.