As the Shelbys come to terms with the shocking events of Christmas Day, Tommy endeavours to unite his family. Until the current threat is dealt with, their only safe place is together in Small Heath. Johnny Dogs and Charlie set about arming the locals – everyone is now a Peaky bodyguard. Tommy enlists the help of tough Romany Gypsy Aberama Gold, who wants something unusual in return.
Season Finale. Chesterfield reels from the theft of the pelts and searches for Harp. Michael meets with Pond and is faced with a hard choice when Sokanon arrives. Josephette and the Brown Brothers unite against Grant, and Harp must deal with enemies on all sides and make new alliances.
The Italians launch another attack on the Peaky Blinders. Tommy realises that the Shelbys need to evolve if they are to survive, but some of the family are reluctant to part with tradition. As the strike takes hold at the Lanchester factory, Tommy pays a personal visit to Jessie Eden, but he is outmanoeuvred when she reveals something she knows about his past. Changretta plots to continue the vendetta in the most devastating way possible.
As well as identifying an enemy of the Shelby family who could help him, Luca makes direct contact with someone at the heart of the Peaky Blinders organisation. While on a secret mission to Afghanistan, President Kirkman meets with two infamous warlords and must determine whom he can trust to hand over territories to the U.S., while Seth has a run-in with Washington, D.C., police that puts his job, reputation and future in the White House on the line.