Death Valley: Motherland Director’s New BBC Crime Drama Pairs Timothy Spall With Gwyneth Keyworth In A Welsh Murder Mystery
A retired TV detective who has never solved a real-life crime, a sharp-witted Welsh police officer, and a murder that brings them together. The BBC’s upcoming crime drama Death Valley is putting an unusual spin on the detective genre, combining gripping mysteries with the kind of comedy that makes its central duo just as entertaining as the cases they investigate.
Directed by Simon Hynd, known for his work on Motherland, the six-part series stars Timothy Spall as John Chapel, a former actor best known for playing a fictional detective, and Gwyneth Keyworth as DS Janie Mallowan, a Welsh detective sergeant with genuine investigative experience.
Their partnership might seem like an unlikely one. John has spent years portraying a brilliant crime solver on television, but his experience of investigating actual murders is another matter entirely. Janie, meanwhile, has the professional knowledge needed to crack a case, even if working alongside an eccentric retired actor is hardly a conventional arrangement.
Yet their differences could be exactly what makes this pairing work. Set against the distinctive landscapes of Wales, Death Valley promises a blend of murder, mystery and humour, with a new investigation to unravel each week.
What Is Death Valley About?
Set in Wales, Death Valley begins when John Chapel’s neighbour is murdered, drawing the retired actor into a real-life investigation that proves very different from the fictional crimes he once solved on screen.
John is something of a national treasure, having spent years starring in Caesar, a hit fictional detective series. But while his television character may have made solving murders look easy, John has never actually cracked a real case.
Enter DS Janie Mallowan, played by Gwyneth Keyworth. A capable Welsh detective sergeant, Janie brings the practical experience that John lacks. The two find themselves working together despite having opposing instincts and very different approaches to solving crimes.
According to the BBC’s official synopsis, the pair form an odd but hilarious partnership as they investigate a series of gripping murders. Each case takes them to different locations across Wales, making the setting an important part of the drama.
However, the mysteries are only part of the story. As John and Janie continue working together, they begin to discover that they have more in common than they initially realise. Despite their differences, they become the closest thing either has to a best friend, gradually helping one another come to terms with the past.
That combination of crime-solving and character-driven comedy gives Death Valley a different dynamic from a traditional police procedural. The central mystery may bring the detectives together, but their evolving friendship promises to be just as important as the cases themselves.
Gwyneth Keyworth Is Already Excited About The Series
For Gwyneth Keyworth, the appeal of Death Valley extends beyond its murder mysteries and comic moments. The actress has also highlighted the show’s celebration of Wales, from its scenery and culture to the distinctive humour of its people.
Speaking about the project, Keyworth said: “Murder. Mystery. Comedy. AND TIMOTHY SPALL! I’m absolutely buzzing. I’m grateful to be working on a show that truly celebrates Wales – not just its landscapes and culture, but also its unique quirks and the humour that defines its people.”
Her enthusiasm reflects the series’ mix of crime drama and comedy, with Wales providing more than simply a backdrop for the investigations.
The show also brings together an impressive selection of actors, including familiar faces from British television and a guest cast whose characters will feature among the murder suspects.
Who Stars In Death Valley?
Timothy Spall and Gwyneth Keyworth lead the cast as the mismatched detective duo, supported by several recognisable names from British television.
The main cast includes:
- Timothy Spall as John Chapel
- Gwyneth Keyworth as Janie Mallowan
- Steffan Rhodri (House of the Dragon) as DCI Clarke
- Alexandria Riley (Baby Reindeer) as Baxter
- Melanie Walters (Gavin & Stacey) as Yvonne
- Remy Beasley (One Day) as Rhiannon
- Mike Bubbins (Mammoth) as Tony
- Rithvik Andugula (Extraordinary) as DC Evan Chaudhry
The series will also feature a substantial guest cast, with actors appearing across the episodes as the investigation introduces different characters and potential murder suspects.
Guest stars include:
- Kiell Smith-Bynoe (Ghosts)
- Sian Gibson (Mammoth)
- Patricia Hodge (A Very English Scandal)
- Jim Howick (Ghosts)
- Karl Johnson (True Love)
- Colin McFarlane (The War Between The Land and the Sea, The Dark Knight Trilogy)
- Vicki Pepperdine (Poor Things, Worzel Gummidge)
- Steve Speirs (Inside No. 9)
- Amy Trigg (Luther)
With its combination of established performers and familiar British television faces, the series has plenty of talent behind its central mystery.
Who Is Behind Death Valley?
The series is created and written by Paul Doolan, who has spoken about his enthusiasm for bringing together two genres he particularly enjoys: crime and comedy.
“I’m such a huge fan of the crime genre and I love writing comedy,” Doolan said. “So, it’s been a delight to see the show come to life with such a brilliant array of actors and guest stars for our murder suspects.”
Simon Hynd, whose directing credits include Motherland, is directing the series, bringing another familiar name from British television comedy to the project.
The creative team’s approach places humour alongside the murder investigations, while the relationship between John and Janie gives the six episodes a continuing storyline beyond the individual cases.
How Can You Watch Death Valley?
At the time of the original announcement on 10 March 2025, the BBC had not confirmed an exact broadcast date for Death Valley. The series was scheduled to arrive later that year on BBC Two, BBC One Wales and BBC iPlayer.
It was also announced for release on BritBox in North America.
With a retired actor who has played a detective for years but never solved a real crime, a police officer who knows what she is doing, and a succession of murders set against the Welsh landscape, Death Valley offers a fresh premise for fans of British crime dramas.
The biggest question is how this unlikely partnership will work when the cases become serious. John may have plenty of fictional detective experience, but working alongside Janie will put his instincts to a very different test.