Jordan Bolger (recurring series 2–4) and Daryl McCormack (series 6; recurring series 5) as Isiah Jesus, Jeremiah's son and a member of the Peaky Blinders. Franc Bruneau as Miquelon Island Police Commissioner (series 6), Head of Police Department on Miquelon Island.

The fifth series runs two years later, from ( Black Tuesday), 29 October 1929, to 7 December 1929, the morning after a rally led by British Union of Fascists leader Sir Oswald Mosley. The IRA remain a presence throughout the series, their rivalry with the Peaky Blinders creating many a grisly face-off as the main story develops.Elsewhere, we also have new additions to the beloved Peaky Blinders cast, in the form of Boston gangster Jack Nelson (James Frecheville), new family arrival Duke Shelby (Conrad Khan), and the fascist mistress of Sir Oswald Mosley (Sam Claflin), Lady Diana Mitford (Amber Anderson). Brian Gleeson as Jimmy McCavern (series 5), the leader of the Billy Boys, a Glaswegian Protestant gang.

James Eeles as "The Digbeth Kid" Harold Hancox (series 2), an aspiring actor hired by the Peaky Blinders to get stood up and spend a week inside jail, only to be killed by Sabini's henchmen. Bríd Brennan as Audrey Changretta (series 3–4), Changretta's mother, wife of Vicente Changretta, head of the Italian crime family in Birmingham, the enemy of the Peaky Blinders. He rides into the Small Heath area of Birmingham on horseback, a war veteran now hellbent on getting his gang back into profit. Daniel Fearn as King Maine (series 2, 4), a boxing trainer in Birmingham who trains Arthur and Bonnie.But what the show does provide is a thoroughly entertaining romp through a world of violence, robbery rackets, betting scams, family loyalties and murder.