BritBox: best new shows streaming August 2026

Discover the best new shows to stream in August 2026 on BritBox with this guide.
The Rumour. Image: BritBox.

BritBox: new in August

Death Valley Season 2 – 4 August

Death Valley Season 2. Image: Britbox.
Death Valley Season 2. Image: BritBox.

Series. The unlikely crime duo is making a welcomed return for Season 2 of the hit Welsh comedy-crime drama, Death Valley. Picking up months after the events of Season one, Janie, played by Gwyneth Keyworth, has been promoted to Detective Inspector and is busier than ever, with paperwork stacking up quicker than she can clear it.

To make matters worse, she’s been ignoring John, played by Timothy Spall, following an unexpected revelation. This season we will see the pair put aside their conflicting differences and work together as they’re called in to bring justice back to the mid-Wales region. 

Starring Timothy Spall (Harry Potter, Mr. Turner, Sweeney Todd, Secrets & Lies), Gwyneth Keyworth (Misfits, Hidden, Black MIrror), Alexandria Riley (Torchwood, The Pembrokeshire Murders, Silo), Rithvik Andugula (O’Dessa, Extraordinary, The Children), and Steffan Rhodri (Submarine, Harry Potter, Wonder Woman).

The Salisbury Poisonings Season 1 – 6 August

Series. This three episode, fact-based drama is about the the 2018 Novichok poisoning crisis in the UK city of Salisbury.

Litvinenko: The Mayfair Poisoning – 7 August

Documentary (2022). Covering the events relating to the infamous assassination of Alexander Litvinenko in 2006 and promising the real story of a murder inquiry and a shocking radiation health emergency.

The Rumour – 13 August

The Rumour. Image: Britbox.
The Rumour. Image: BritBox.

Series. In The Rumour (based on the novel of the same name by Lesley Kara), Joanna, played by  Rachel Shenton (All Creatures Great & Small, For Her Sins, Switches at Birth), moves to a small town in search of quiet life with her son Alfie, played by Eiden-River Coleman.

She is increasingly suspicious of the community after uncovering a rumour about a local child killer hiding in plain sight. Joanna seizes the chance to bond with the local mums by sharing it but things take a turn for the worst as it unleashes a wave of paranoia and suspicion. 

Starring Rachel Shenton (All Creatures Great & Small, White Gold, Switches at Birth), Joanne Whalley (Edge of Darkness, The Signing Detective, Willow), Emily Atack (Iron Sky, Lies We Tell, The Inbetweeners), Liza Sadovy (A Real Pain, A Small Light, Patience), and Carryl Thomas (Emmerdale, Family Affairs, Silo).

Freddie Flintoff’s Field of Dreams – 14 August

Series. Former professional cricketer and current TV presenter Freddie Flintoff is determined to prove anyone can play cricket whatever their background.

Sister Boniface Mysteries Season 4 – 26 August

Sister Boniface Mysteries Season 4. Image: Britbox.
Sister Boniface Mysteries Season 4. Image: BritBox.

Series. The Vespa-riding, genius Catholic nun is back, and this time she’s facing down killer scarecrows. The award-winning Sister Boniface returns to the rural English village of Great Slaughter for another season of cozy mysteries set in the 1960s, in this spin-off of Father Brown.

Played by Lorna Watson, Sister Boniface splits her time between her duties at the convent, her winemaking, and her role as scientific adviser to the local police. Season four is the show’s weirdest and wildest yet, sending the team into a string of increasingly outlandish cases: a fatal game show, a deadly town-wide women’s strike, and yes, those murderous scarecrows.

Starring Lorna Watson (The IT Crowd, Christmas at the Riviera, Forget Me Not), Jerry Iwu (Sex Education, Innocent, Halal Daddy), Max Brown (Downtown Abbey, Paradise Lost, Beauty and the Beast), and Ami Metcalf (Allied, Pan, Crawl).

Unforgotten Season 6 – 27 August

Unforgotten Season 6. Image: Britbox.
Unforgotten Season 6. Image: BritBox.

Series. This BAFTA Award-nominated drama follows a team of London detectives as they investigate complex cold-case murders and disappearances, each season built around a single buried mystery and the unlikely lives it pulls back into the light.

Season 6 centres on a chilling cold case after dismembered human remains are dredged up from Whitney Marsh. Detectives DCI Jess James, played by Sinéad Keenan, and DI Sunny Khan, played by Sanjeev Bhaskar, work to piece together the victim’s final years, slowly drawing in a handful of seemingly unconnected strangers, each hiding a link to his death they’d rather keep buried.

Starring Sinéad Keenan (Little Boy Blue, Doctor Who, Being Human), Sanjeev Bhaskar (Yesterday, The Kumars at No. 42, The Sandman), Jordan Long (The Gentleman, Kingsman, Dune), Carolina Main (Fan, Old Jack’s Boat, Blood), Hiten Patel (Animal, This England), and Pippa Nixon (John Cater, Containment, Censor).

BritBox: recent highlights

Exile – 30 July

Exile. Image: Britbox.
Exile. Image: BritBox.

Series. This BAFTA-nominated psychological thriller follows Tom Ronstadt, a disgraced London journalist who returns to his hometown in Lancashire after 18 years to care for his estranged father, Sam, who is suffering from advanced Alzheimer’s disease.

As Tom confronts the traumatic events that drove him away, he starts to uncover long buried secrets, a web of corruption and a devastating crime with ties to his family.

This gripping and emotionally powerful drama explores memory, guilt and redemption, building to a series of thrilling revelations that challenge everything Tom thought he knew about his past.

Starring John Simm, Jim Broadbent, Olivia Colman and Nico Mirallegro.

Mint Season 1 – 17 July

Mint Season 1. Image: Britbox.
Mint Season 1. Image: BritBox.

Series. A reimagined Romeo & Juliet set against two rival gangs in industrial Scotland, where loyalty and love collide.

Written and directed by Charlotte Regan (Scrapper, Standby, The Responder), this beautifully shot series is celebrated for its distinctive, dreamlike aesthetic, drawing on her background in music videos and a bold streak of magical realism.

The series follows Shannon, played by Emma Laird, the daughter of a powerful crime family, whose world unravels when she falls for someone from the opposing side. Loyalty, betrayal, and impossible choices follow.

Starring Emma Laird, Laura Fraser, Sam Riley and Benjamin Coyle-Larner.

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Paul Dalgarno is author of the novels A Country of Eternal Light (2023) and Poly (2020); the memoir And You May Find Yourself (2015); and the creative non-fiction book Prudish Nation (2023). He is Head of Content at ArtsHub & ScreenHub. Insta: @dalgarnowrites