Grace series 6: Episode 4 One of Us Is Dead cast includes Daniel Lapaine and James Gaddas
But will everyone survive the finale unscathed?
Grace series 6 comes to a gripping conclusion this weekend, with several cast members in danger during the feature-length episode 4, One of Us Is Dead.
This week (Sunday, April 19, 2026), Roy and the team continue to deal with recent distressing events… But, of course, normal police work goes on. They are called to the scene of a car accident in which a local hotelier was killed by a driver who fled the scene and left him to die.
As Grace tackles what may prove to be one of his most complex cases yet, DC Vee Wilde faces a challenge of her own when she comes face-to-face with her estranged father after many years.
Meanwhile, Grace’s life takes a “devastating turn” as his wedding to Cleo draws near. Here’s who plays who in the guest cast of Grace series 6 episode 4 One of Us Is Dead.
Grace One of Us Is Dead cast: Daniel Lapaine plays Arno Maddox
Daniel Lapaine, 54, portrays Arno Maddox in the cast of Grace this week. The Australian actor is probably best known for playing David Van Arkle in the 1994 film Muriel’s Wedding. Yes, reader, the heartthrob that Muriel ended up marrying.
It was easily the role that catapulted him to global fame. In 1989, he made his very first TV appearance in Home and Away. He subsequently appeared in dozens of films. These include Collusion, Ritual, Double Jeopardy, and Elephant Juice.
Between 2015 and 2019, Daniel famously played Daphne’s dad Dave in the Sharon Horgan comedy Catastrophe.
Other notable roles include Prince Wendell in The 10th Kingdom, Richard Lomas in Jane Hall, Ned in Hotel Babylon, Hugh Jarvis in The Durrells, and Toby Flynn in Upright.
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Recently, he’s had something of a spurt… Daniel portrayed Elliot Howard in The Marlow Murder Club, Rod Rogers in Safe Harbor, and Daniel Frederick in Wild Cherry.
Are Daniel Lapaine and Fay Ripley still married?
Fay Ripley fans will probably know Daniel as her “toyboy” husband! The Cold Feet star is 60, making hubby Daniel six years younger.
Fay and Daniel live together in London and have two children. They met way back in 1998, but didn’t start dating until they met years later in New York.
In 2017, during an appearance on Loose Women, Daniel spoke about how he “hunted” Fay down. He said: “I decided on her, I hunted her down. I think we both hunted each other. It was mutual hunting. She’s an extraordinary woman.”
In 2001, Fay and Daniel tied the knot in a ceremony in Tuscany, Italy. In October 2002, the couple welcomed their first child, a daughter named Parker. Four years later, in October 2006, Fay and Daniel’s second child, a son called Sonny, was born.
And the secret to their lasting marriage? They make sure they are never apart “for too long”.
James Gaddas portrays Dave Rowsham
Durham-born James Gaddas, 65, pops up fleetingly as Dave Rowsham. He helps Roy and Glen when their investigation takes them aboard a swanky yacht.
TV, film, and theatre actor James Gaddas is perhaps best known for his role in Bad Girls between 2002 and 2006. James’ character Neil Grayling was the Governor until his demotion to G-Wing Governor. The character was famous for his closeted sexuality, and shocking death of Legionnaire’s Disease.
Soap fans will recognise him as Vinny Sorrell in Coronation Street, a role he played between 1999 and 2000. Vincent ‘Vinny’ Sorrell was a Rovers cellarman and boyfriend of landlady Natalie Barnes. He eventually ran off to Southampton with his new girlfriend, Natalie’s sister Debs Brownlow.
James Gaddas first popped up on our screens in 1983 in an episode of Seaview, and subsequently went on to appear in episodes of TV series such as Crown Court, Dempsey and Makepeace, Troubles, Something for the Weekend, and The Camomile Lawn.
Between 1994 and 1995, James played DI Latham in the Joanna Lumley drama Class Act. At the same time, he portrayed senior registrar Dr Robert Nevin in Medics between 1992 and 1995. He went on to play Jack Harcourt in Doctors, prisoner Ged in Emmerdale, and Cormac Ranger in Hollyoaks.
Having been off our screens for a few years, he recently reappeared as Lindsay Calder-Marshall in Sister Boniface Mysteries, and Harry Tynham in The Marlow Murder Club.
In real life, James Gaddas was selected as Conservative candidate for Stockton South in the 2005 general election, but finished in second place behind Labour’s Dari Taylor.
Grace One of Us Is Dead cast: Lochlann O’Mearáin star as Rufus Rorke
Killiney-born actor Lochlann O’Mearáin, a 52-year-old dad of four, plays Rufus Rorke in this week’s Grace finale.
The Irish actor has been on our screens for more than 25 years, having made his name playing Rohan in the mythical fantasy series Mystic Knights of Tir Na Nog. He subsequently starred as Dara Ó Ríordáin in the Irish language soap Ros na Rún, set in an imaginary Connemara village.
Lochlann is perhaps best known for playing Rory Dwyer in Dervla Kirwan drama Smother. Other notable roles include Horrocks in Outlander, Ryan in Can’t Cope, Won’t Cope, Aidan in Finding Joy, and Cormac Byrne in Holding.
More recently, he’s portrayed Harry Benedict in cosy crime drama Harry Wild.
Who plays Roel Albazi?
Bosnian-Herzegovinian and British-based actor Velibor Topic stars as Roy Grace’s arch-villain Roel Albazi. He was in Sarajevo during the Siege of Sarajevo, where he was part of a theatre group. He subsequently moved to London.
On TV, he’s appeared in episodes of Taggart, William and Mary, Silent Witness, Holby Blue, and NCIS: Tony & Ziva. Velibor has also been on dozens of films, including Kingsman: The Secret Service, Our Kind of Traitor, Kingdom of Heaven, and Mission: Impossible – Fallout.
Also appearing in the cast of Grace series 6 episode 4 One of Us Is Dead are:
Michael Shaeffer plays James Taylor. Having been on our screens for 25 years, he has popped up in TV dramas such as Silent Witness, New Tricks, Bodyguard, The ABC Murders, Karen Pirie, SAS Rogue Heroes, and Bodies.
In 2020, he played key government official Stephen Kemp in the brilliant The Salisbury Poisonings.
Jobbing actress Alex Childs stars as Fiona Rorke. She is best known for playing Tara Peters in Hollyoaks, Lady Lyzera in the children’s show Wizards vs. Aliens, and Caroline in Benidorm.
Kerri McLean portrays Carla Lambert. She’s previously played Kitty Despard in Poldark, and Maeve in Bodkin.
Nina Barker-Francis stars as Rose Lambert. She played Chloe in eerie drama The Jetty, and Chill Spen in Moonhaven.
Jobbing actor Mark Flitton joins the cast of Grace this week as PC Dave Cripps. He’s been on our screens for more than 25 years, and has appeared in TV series such as EastEnders, Casualty, Whitchapel, Hidden, Thirteen, and A Spy Among Friends. He first popped up as Cripps in Grace series 5.
British/Iranian actor Dana Haqjoo plays DC Vee Wilde’s dad James Vernon. Viewers will know him for portraying Beirut Police Chief in The Ipcress File in 2022, a judge in Showtrial, and Nazir Jaafar in The Bombing of Pan Am 103.
Actor Babirye Bukilwa plays Femi Obasi. She is most famous for starring as DC Dominique Parkes in crime drama We Hunt Together, Sammie in Domino Day, and Vanessa in Dreaming Whilst Black.
Full cast list of Grace series 6 eposode 4 One of Us Is Dead:
John Simm stars as Det Supt Roy Grace.
Richie Campbell returns as DI Glenn Branson.
Zoe Tapper plays Cleo Morey.
Laura Elphinstone portrays DS Bella Moy.
Brad Morrison is DC Nick Nicholl.
Rebecca Scroggs stars as Ari Branson.
Juliette Motamed portrays DC Vee Wilde.
Finn Guegan as Bruno.
Alexander Cobb as Kevin Spinella.
Carolina Valdés as Dr Nadiuska De Sancha.
The huge ensemble guest cast includes:
Daniel Lapaine as Arno Maddox.
Lochlann O’Mearáin as Rufus Rorke.
Alex Childs as Fiona Rorke.
Michael Shaeffer as James Taylor.
Kerri McLean as Carla Lambert.
Nina Barker-Francis as Rose Lambert.
Mark Flitton as PC Dave Cripps.
Dana Haqjoo as James Vernon.
Babirye Bukilwa as Femi Obasi.
Velibor Topic as Roel Albazi.
Nouvelle Maud’s Richard Keep as Bryson Lambert.
The Stolen Girl‘s Charlie Oscar as Paisley Laing.
We Are Lady Parts’ Faith Omole as Amara Obasi.
Hollyoaks’ Barbara D’Alterio as Debbie Rivers.
Laura Cairns – aka Dr Cartwright in a recent episode of EastEnders – as Chef Donna.
Out There‘s Carly-Sophia Davies as Lucy Roberts.
I Hate Suzie’s Yasser Zadeh as Milo Shah.
The Trouble with Maggie Cole’s Ray Strasser-King as Finn Maxwell.
The Bisexual’s Hannah Almond as forensic vehicle examiner.
Read more: Grace on ITV recap: How series 5 ended and what it means for series 6
