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ITV's British Detective drama Grantchester will premiere its Season 10 finale (Episode 10) on MASTERPIECE Mystery! on PBS on August 3, 2025.
The show, based on James Runcie's collection of short stories, premiered its Season 10 on June 15. Weekly episodes premiered every Sunday for the US audiences on the PBS app.
Grantchester stars Robson Green as DI Geordie Keating, Nick Brimble as Jack Chapman, Oliver Dimsdale as Daniel Marlowe, and Rishi Nair as the Reverend Alphy.
The Season 10 finale will feature a high-stakes murder case, causing disagreement between Alphy and Geordie.
More on this in our story.
Grantchester Season 10 Episode 8: Release and streaming details
Grantchester Season 10 Episode 8 will premiere on MASTERPIECE Mystery! on PBS on Sunday, August 3, 2025, at 9 PM. Since the British series is exclusively streaming on the PBS app in the US, you will need a subscription to watch the finale.
According to the official PBS app:
“In the U.S., each episode streams online for 14 days starting at 9pm ET on the night of its national broadcast premiere. If you watch with PBS Passport, an added PBS station member benefit, all eight episodes of Season 10 will be available to binge the night of the season premiere June 15 at 9/8c.”
The official synopsis of Grantchester Season 10 Episode 8 reads as follows:
"Alphy and Geordie keep an eye on rising tensions as a controversial figure is invited to speak at the university. When a murder is committed, however, they disagree on how to approach the case."
The Season 10 finale will feature a high-stakes murder case with a controversial figure. With the growing tensions between Alphy and Geordie (about the former's mother's past), it looks like they will disagree on how to investigate the case, which will create exciting drama for the finale.
What happened in Grantchester Season 10 Episode 7?
The penultimate episode featured a murder mystery case at Cece's Boutique, which was just three days away from its grand opening. While all the arrangements were made, they still needed to do a photoshoot for the circulars.
Cece and Mrs. C had hired a self-important photographer, Tony Parker, who was very good at his job, and two models, Grace Tuffit and Pheline Meyer. While the arrangements for the shoot were all complete, Cece discovered that their clothes supplier, Kate Ashley, had delivered an altogether different line of clothing than promised.
However, when Mrs. C arrived at the boutique the next morning, she found Tony dead and shot through the heart. The case became even more interesting for Geordie when he discovered that it was related to Larry and Jenny's diamond theft case, as the diamond was photographed by Tony.
They believed that Tony had stolen the diamond and was conspiring with someone to keep the prize for good. While Geordie was suspicious of Pheline, as Tony had controversial photos of her, it was Grace who actually killed him.
In Grantchester Season 10 Episode 7, when Larry and Jenny found two tickets to the Caribbean, it was clear that the debt-ridden Grace had murdered Tony to keep the diamond for herself.
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