Death Valley (2025) Review: Cosy Crime With a Welsh Accent

Is Death Valley worth watching?

Yes. Death Valley is a charming, well-made cosy crime series whose real mystery is how quickly its mismatched detective duo becomes irresistible. Timothy Spall and Gwyneth Keyworth have excellent comic chemistry, and the Welsh valleys give each case a distinctive backdrop. The reservation is that the mysteries follow a familiar formula, and viewers who want to be genuinely outwitted may find the solutions arrive on schedule.

What is Death Valley about?

John Chappell (Timothy Spall) is a grumpy, reclusive former actor who once starred as a television detective. When his neighbour is murdered, he finds himself working alongside Janie (Gwyneth Keyworth), an energetic young detective sergeant with a very different approach. He thinks like a man who has spent years playing an investigator on screen; she follows the rules of actual police work. Their clashing instincts turn into an unlikely partnership, and each episode brings a new case set somewhere in the South Wales valleys.

Death Valley was created by Paul Doolan for the BBC and first aired in 2025. It is a British series in English, set and filmed in Wales, with Steffan Rhodri, Alexandria Riley, Melanie Walters and Rithvik Andugula in the supporting cast. This review covers seasons 1 and 2, 12 episodes in total; the series is ongoing.

Spall and Keyworth make the case

The show’s greatest asset is its central pairing. Timothy Spall plays John with a wonderfully lugubrious grumpiness, a man who has retreated from the world and resents being dragged back into it, yet can’t resist the chance to play detective for real. His theatrical instincts, borrowed from years of performing a sleuth, are often absurd and occasionally inspired, and Spall wrings every drop of comedy from them without losing the character’s loneliness.

Gwyneth Keyworth is his perfect foil. Her Janie is bright, eager and practical, underestimated by colleagues but sharper than she looks, and she gives the partnership an easy warmth. The comedy of their relationship, veteran cynicism against youthful determination, is the element that turns a routine mystery show into appointment television.

Welsh settings as more than scenery

The valleys, villages and coastlines of Wales give the series a strong sense of place, and each case makes use of a local community, from small-town societies to tight-knit workplaces. The writing gently teases Welsh life without mocking it, and the supporting cast of locals feels grounded rather than caricatured. The photography makes the most of the landscape, adding to the comfortable Sunday-evening feel.

Where the formula shows

The mysteries themselves are the weakest element. Each episode follows a similar pattern of odd suspects, misdirection and a neat solution, and seasoned crime viewers will often guess the culprit before John and Janie do. The stakes are deliberately low, which suits the tone but means there is little genuine tension. Some of the comic set pieces lean towards the broad, and the series is at its best when the jokes come from character rather than slapstick.

Who should watch Death Valley?

It is a natural fit for fans of cosy crime, gentle British comedy and self-contained mysteries you can watch one at a time. Twelve episodes across two seasons make it an easy commitment, and each case stands mostly on its own. The content is mild: murders happen off screen or without gore, and the language is light, making it suitable for family viewing with older children. More mystery series can be found on the same shelf.

If you enjoy it, try these:

• Broadchurch for a far darker British mystery with a similarly strong detective partnership.
• Inside No. 9 for British comedy that likes to mix laughs with murder and twists.

The verdict

Death Valley is a warm, witty mystery comedy that succeeds because of its lovable central duo and its affectionate sense of place. The cases are predictable and the stakes gentle, but as comfort viewing it is hard to fault, and Timothy Spall is a joy throughout.

Rating: 4/5