After a year-long hiatus, one of PBS Masterpiece's most beloved British detective series is back for its swan song. Grantchester returns for its 11th and final season on June 14, 2026, and it's bringing along a familiar face from another cherished British drama. Nicholas Ralph, best known for playing veterinary surgeon James Herriot in All Creatures Great and Small, will make a memorable guest appearance in the July 12 episode.
Ralph steps into the role of John Planer, a clergyman who has just returned to England after serving on a mission in Africa. His character crosses paths with Alphy (Rishi Nair) during a weekend retreat at Bishop Grey's (Stuart Bowman) lavish home, where a group of vicars has gathered to curry favor with their superior. But the peaceful gathering takes a dark turn when a man's body is discovered nearby, clutching a Bible. Detectives Geordie Keating (Robson Green) and Larry Peters (Bradley Hall) quickly enlist Alphy's help, and the vicars themselves become prime suspects.
Showrunner Daisy Coulam revealed that the episode was inspired by the award-winning film Conclave, with the idea of "getting loads of religious men together and seeing what happens." However, she noted that the Grantchester episode is considerably funnier than the acclaimed film. The storyline also deepens Alphy's ongoing struggle with his faith, as he realizes some of his fellow clergymen are not being truthful.
Nair, who joined Grantchester in Season 9, had nothing but praise for his new co-star. He described Ralph as "a great actor to work with" and said they got along very well. Ralph's casting adds a layer of excitement for fans of both shows, especially since All Creatures Great and Small was recently renewed for seventh and eighth seasons last November.
Also returning for the final season is Alphy's love interest, Meg (Christie Russell-Brown), whose father, as viewers may recall, is Bishop Grey. This family connection adds further tension to the investigation. The season promises to deliver the same blend of crime-solving, character drama, and period charm that has made Grantchester a staple of PBS programming.
For fans looking for more British drama, this British sci-fi comedy gave time travel a fresh spin before its US remake fizzled. Meanwhile, Netflix's The Lincoln Lawyer dominates streaming in June 2026 as its own final season approaches.
Grantchester Season 11 premieres on PBS in the U.S. on June 14, 2026, with new episodes airing weekly. The season will also air on ITV in the UK at a later date. Don't miss the final chapter of this beloved series, complete with a guest star who is sure to delight fans of British television.
