what happens to finn in peaky blinders

By the end of the TV series Peaky Blinders , Finn Shelby (Tommy’s youngest brother) is formally banished from the Shelby family and the Peaky Blinders , but he is not killed.

What went wrong for Finn

• Finn is put in charge of the betting‑bookmaking arm of the business and supervises Billy Grade , who secretly works as an IRA informant.

• After a night of drinking, Finn carelessly tells Billy about the Shelbys’ plan to assassinate Oswald Mosley on the night of the Bingley Hall rally. This information leaks to the IRA, and several key figures—Polly Gray, Aberama Gold, and Barney Thompson —are later killed when the IRA interferes.

• When Tommy discovers that Billy has been feeding secrets to the enemy, he has Duke interrogate Finn and Billy to expose the traitor.

His “execution” and expulsion

In the finale (“Lock and Key”), Duke forces Finn and Billy to play a version of Russian Roulette to test loyalty and reveal betrayal.

• The revolver is secretly unloaded, so both men survive the first shots, but Finn fails the loyalty test:
  • He refuses to pull the trigger on Billy, showing he values his own life over the family’s rules.

• Duke then shoots Billy dead and informs Finn that, by order of the Peaky Blinders, he is excommunicated from the family and the gang.

• Finn storms out, shouting, “I will come for you,” implying he may seek revenge in the future (hinting at his possible role in the upcoming Peaky Blinders feature‑film continuation).

His status in the later story

• In the Peaky Blinders film “The Immortal Man” (released in 2026), several old characters return—but Finn does not appear , which has sparked discussion among fans about whether his banishment is permanent or if he will return later.

• As of now, canon treats him as alive but cut off from the Shelby family , setting up tension for a potential comeback tied to his promise of revenge.

If you tell me which season or episode you’re on, I can walk you through his arc without spoiling ahead.