Polly Walker (Line of Duty) is set for a recurring role in the upcoming Epix drama series Pennyworth, the Batman prequel from Gotham showrunner Bruno Heller, executive producer/director Danny Cannon and Warner Horizon Scripted TV.

The 10-episode, hourlong drama series is based on DC characters created by Bob Kane with Bill Finger. It follows Bruce Wayne’s legendary butler, Alfred Pennyworth (Jack Bannon), a former British SAS soldier in his 20s, who forms a security company and goes to work with a young billionaire Thomas Wayne (Ben Aldridge), who’s not yet Bruce’s father, in 1960s London. The series also stars Paloma Faith as Bet Sykes and Jason Flemyng as Lord Harwood.

Walker will play Peggy Sykes – sister of Bet Sykes – one of Lancashire’s busiest and most successful dominatrixes. The sensible matriarch in a family of maniacs, Peggy is fiercely loyal, endlessly resourceful and lives by her own strange but rigorous moral code.

Heller and Cannon executive produce and Cannon will direct the pilot episode. Production is underway at Warner Bros Studios Leavesden in the UK.

Walker’s previous credits include Line of Duty, Prisoners’ Wives, The Mentalist and Rome.