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Grantchester star joins 'gritty' returning crime drama with Midsomer Murders actor

Filming is underway on season six of ITV's hit detective series, Grace

Nicky Morris
Deputy TV and Film Editor
May 13, 2025
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ITV has revealed the impressive line-up of guest stars for the sixth season of its hit crime drama, Grace, which is currently being filmed in Brighton. 

The popular series stars John Simm as the titular DS Roy Grace, as he and his crack team of detectives solve crimes across the city for the East Sussex Police. 

John is joined by a host of fresh faces for the new season, including Rishi Nair, who currently stars as Alphy Kotteram in ITV's detective drama Grantchester, as well as Ali Khan (Showtrial), Gurjeet Singh (Ackley Bridge), Hannah McClean (Blue Lights), Tamla Kari (The Musketeers) and Sara Powell (Midsomer Murders, The Killing Kind).

RISHI NAIR as Alphy Kotteram in Grantchester© ITV
Grantchester's Rishi Nair has joined the guest cast of season six

Who else is returning for season six? 

Richie Campbell will reprise his role as DI Glenn Branson, alongside Laura Elphinstone as DS Bella Moy. 

two men in suits standing in front of police car© Jonathan Browning
John Simm and Richie Campbell star in the drama

Also set to return are Zoë Tapper as Cleo Morey and Brad Morrison as DC Nick Nicholl.

What to expect from season six

As usual, the new series will be based on the best-selling novels by crime writer Peter James and consists of four standalone films.

A first look at the new series sees John, Richie and Laura in character, donning forensic suits while John holds a clapper board to mark the beginning of filming.

three actors in forensic suits on set of tv show© ITV
Filming is underway on season six

The titles for the series, taken from Peter's books, include: 'Left You Dead', 'Picture You Dead', and 'One Of Us Is Dead'.

close-up of blonde woman in doctor's room© ITV
Hannah McClean has also joined the drama

Speaking about returning to the role for the sixth season, John said: "This is the longest I've been involved in any show! But it's such a joy to do, and to be surrounded by a team like this for large chunks of the year makes it impossible to turn down. I'm really looking forward to seeing where Roy’s journey goes in this series."

A release date has yet to be announced. 

5 top ITV drama series

JAMES NORTON as Pete Riley in Playing Nice© ITV

1. The Bay

Set in Morecambe Bay, Lancashire. Investigator Lisa Armstrong is assigned to support and talk to the families of missing persons. When she discovers a personal connection to a case she's working on, her emotional involvement may cause her to overlook crucial clues. 

2. A Cruel Love: The Ruth Ellis Story

A dark love story about Ruth Ellis (Lucy Boynton), the last woman to be executed in the UK in the 1950s. The historical crime drama follows her turbulent life as a nightclub manager and her violent relationship with the man she eventually murders.

3.  Unforgotten

Detectives Cassie Stuart and Sunil Khan are on the top of their game to solve a series of cold cases including murders and strange disappearances. But are there consequences to digging up crimes and secrets from the past? 

4. Out There

Nathan Williams (Martin Clunes), plays a farmer who risks everything to protect his son after he becomes involved with a drug gang. The dark world of county lines drug cartels begins to seep into the family's rural life. 

5. Playing Nice

James Norton stars in this nightmare thriller about what happens when two sets of parents realise their sons may not be their biological children.

Grace's future beyond season six

While the show has yet to be renewed for a seventh season, leading star John revealed that there are "plenty of cases to solve". 

When asked whether the show could go beyond Peter James' books, the actor told RadioTimes.com that while Peter has "a treasure trove of ideas", the show has "quietly" deviated from the books over the last few years. 

Richie Campbell, Zoe Tapper and John Simm© ITV
The series follows Brighton-based detectives

"For instance, Bella Moy dies quite early on in the books, and we kept Bella Moy alive, and various characters are different and storylines are different. So I think that's quite important," explained the actor. 

"I quite like the fact that people who have read all the books, they get the rug pulled from under them when they think they know what's going to happen, but it's completely different."

He added: "So, yeah, I'm not really worried about that. I think we've got plenty of cases to solve."

Seasons one to five of Grace are available to stream now on ITVX.

WATCH: The trailer for Grace season 5

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