Meet the Cast of BBC’s ‘Death Valley’: Timothy Spall Leads a Star-Studded Welsh Mystery

The BBC’s six-part mystery series “Death Valley,” set in Wales, follows an unlikely pair of crime fighters and features a lineup of well-known British actors. The show stars Timothy Spall as John Chapel, a treasured national figure turned amateur detective, and Gwyneth Keyworth as DS Janie Mallowan, who together tackle enigmatic cases—like the murder of an amateur dramatics theatre director—unfolding across the season. The episode airing on June 15, 2025, will air at 8:15 pm and last around 45 minutes; all episodes are already available to stream on BBC iPlayer.

Spall, recognised for roles such as Peter Pettigrew in the “Harry Potter” series and the titular artist in “Mr Turner,” brings gravitas to the lead role. Keyworth, familiar from “Game of Thrones,” “Misfits,” and “Defending the Guilty,” plays Chapel’s investigative partner. Veteran actor Steffan Rhodri (known from “Gavin and Stacey” and “Harry Potter and the Deathly Hallows – Part 1”) portrays DCI Barry Clarke, while Alexandria Riley, a BAFTA Cymru nominee from “The Pembrokeshire Murders,” “The End of the F***ing World,” and Apple TV’s “Silo,” plays Baxter.

Supporting cast members include familiar faces: Rithvik Andugula, Melanie Walters, Patricia Hodge, Remy Beasley, Mike Bubbins, Sian Gibson, Amy Morgan, Steve Spiers, Eryn Kelleher, and Nathan Foad. Their characters range from DC Evan Chaudhry to theatre suspects and community figures involved in each case. With its strong ensemble of seasoned and emerging talent, “Death Valley” combines compelling Welsh settings with character-driven mysteries, delivering both homegrown charm and dramatic intrigue. Expect emotional depth, theatrical subplots, and an exploration of personal demons as the investigative duo navigates complex crimes in rural Wales.