Channel 4 thriller Suspect is back on our screens for another gripping murder mystery – and once again the series boasts a seriously starry cast.

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Anne-Marie Duff returns in a leading role as Dr Susannah Newman, a therapist who sets out to track down a serial killer and prevent a murder after a mysterious new therapy client, played by Dominic Cooper, makes a disturbing confession while under hypnosis.

Duff is joined by a handful of new stars, including Tamsin Greig and Eddie Marsan, as well as fellow season 1 cast member Ben Miller.

But who else is in the cast for season 2 and who do they all play? Read on for everything you need to know about the cast and characters in Suspect.

Suspect season 2 cast

Anne-Marie Duff plays Dr Susannah Newman

Anne-Marie Duff as Dr Susannah Newman and Ben Miller as Detective Superintendent Richard Grove in Suspect season 2 having a tense conversation and looking stressed.
Anne-Marie Duff as Dr Susannah Newman and Ben Miller as Detective Superintendent Richard Grove in Suspect season 2. Channel 4

Who is Dr Susannah Newman? Susannah is a therapist, Danny's ex-wife and mother to Christina, who was murdered in season 1. In season 2, she is set on a new mission after a client, Jon, makes a disturbing admission while under hypnosis.

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Where have I seen Anne-Marie Duff before? She played Violet Miller in the the film Suffragette, and Julia in the John Lennon biopic Nowhere Boy. She played Fiona Gallagher in Shameless, and more recently Erin Wiley in Netflix's Sex Education, Ma Costa in His Dark Materials and Grace in Bad Sisters.

Dominic Cooper as Jon Fallow

Dominic Cooper as Jon in Suspect season 2, with his hand to his chin and looking up
Dominic Cooper as Jon in Suspect season 2. Channel 4 / Toon Aerts

Who is Jon Fallow? Jon is a mysterious new client of Susannah's who makes a disturbing admission while under hypnosis.

Speaking about his character, Cooper previously told RadioTimes.com that he's an "extreme, very damaged person".

Where have I seen Dominic Cooper before? Cooper is known for his role as a young Howard Stark in the MCU, as well as playing Sky in Mamma Mia!. He has also starred in The History Boys, Preacher, The Gold and My Lady Jane.

Ben Miller plays Detective Superintendent Richard Groves

Ben Miller as Detective Superintendent Richard Groves in Suspect, wearing a suit and glasses and looking forwards
Ben Miller as Detective Superintendent Richard Groves in Suspect. Channel 4/Toon Aerts

Who is Richard Groves? Richard is the Detective Superintendent who was Danny's boss. He was having an affair with Susannah.

Where have I seen Ben Miller before? Miller is known as one half of the BBC comedy sketch series The Armstrong and Miller Show, while he has also had major roles in Bridgerton, Death in Paradise, Paddington 2, Professor T and Johnny English.

Tamsin Greig plays Natasha Groves

Anne-Marie Duff as Dr Susannah Newman, Ben Miller as Detective Superintendent Richard Groves and Tamsin Greig as Natasha Groves in Suspect season 2
Anne-Marie Duff as Dr Susannah Newman, Ben Miller as Detective Superintendent Richard Groves and Tamsin Greig as Natasha Groves in Suspect season 2. Channel 4 / Toon Aerts

Who is Natasha Groves? Natasha is Richard's wife and a high-end corporate lawyer, who previously worked for the Crown Prosecution Service.

Where have I seen Tamsin Greig before? Greig is known for her roles in comedy series such as Green Wing, Episodes and Friday Night Dinner, as well as for playing Debbie in The Archers. She has also had roles in Shaun of the Dead, Doctor Who, Belgravia, Sexy Beast, Inside No. 9 and The Completely Made-Up Adventures of Dick Turpin.

Eddie Marsan plays Dr Alistair Underwood

Eddie Marsan as Dr Alistair Underwood in Suspect, sat behind a desk
Eddie Marsan as Dr Alistair Underwood in Suspect. Channel 4 / Toon Aerts

Who is Dr Alistair Underwood? Alistair is a doctor who works on the psychiatric unit where Danny is being held following the end of season 1.

Where have I seen Eddie Marsan before? Marsan has had roles in films including Gangs of New York, Vera Drake, Mission: Impossible III, Sherlock Holmes, War Horse, The World's End, Deadpool 2, Vice, Fast & Furious: Hobbs & Shaw, The Gentlemen and Back to Black. He has also had roles in series including Ray Donovan, The Thief, His Wife and the Canoe, The Power, The Winter King, Franklin, Inside No. 9 and Supacell.

Céline Buckens plays Sapphire

Céline Buckens as Sapphire in Suspect, walking through a hotel lobby
Céline Buckens as Sapphire in Suspect. Channel 4 / Toon Aerts

Who is Sapphire? Sapphire is a high-class escort who holds key information surrounding the case Susannah is investigating.

Where have I seen Céline Buckens before? Buckens is known for her roles in War Horse, Free Rein, The Good Liar, Bridgerton, Showtrial, The Ex-Wife and The Castaways.

Nicholas Pinnock plays Joseph Buckley

Nicholas Pinnock as Joseph Buckley in Suspect, stood in an alley
Nicholas Pinnock as Joseph Buckley in Suspect. Channel 4 / Laurence Cendrowicz

Who is Joseph Buckley? Joseph is an old client of Susannah's who is ex-military and suffered from PTSD. He ended up falling in love with her so she ended their sessions, but she now comes to him for help.

Where have I seen Nicholas Pinnock before? Pinnock has previously had roles in series including Grange Hill, Top Boy, Fortitude, Marcella, Counterpart, Criminal: UK, For Life, Django and This Town.

Gina McKee plays Kate

Gina McKee as Kate in Suspect, sat at a table on a river boat
Gina McKee as Kate in Suspect. Channel 4 / Laurence Cendrowicz

Who is Kate? Kate is a psychotherapist and a friend of Susannah.

Where have I seen Gina McKee before? McKee has had roles in series such as Our Friends in the North, The Forsyte Saga, Vera, Line of Duty, The Borgias, Hebburn, Bodyguard and Catherine The Great, and in films including Notting Hill, Atonement, In the Loop, Phantom Thread, My Policeman, Typist Artist Pirate King and The End We Start From.

Season 1 cast

James Nesbitt plays Danny Frater

Suspect
James Nesbitt plays Danny Frater in Suspect

Who is Danny Frater? A veteran detective whose estranged daughter, Christina, was found dead, leading Danny to become obsessed with solving the case - and learn more about the daughter he realised he never truly knew.

Nesbitt said of his character: “I could relate to Danny, with his flaws, vulnerabilities and the devastating situation he faces, from the very first moment I picked up the script."

Where have I seen James Nesbitt before? On the big screen, he's perhaps best known as the dwarf Bofur in The Hobbit film trilogy alongside Martin Freeman. Otherwise, he's known for the likes of Cold Feet (as Andy Williams), Lucky Man, Stay Close, Line of Duty, Bloodlands, The Missing, Cherrybomb, Walking Ned and Match Point.

Joely Richardson plays Jackie

Suspect (Jackie)
Joely Richardson plays Jackie in Suspect Channel 4

Who is Jackie? A pathologist who worked with Danny.

Where have I seen Joely Richardson before? The daughter of Vanessa Redgrave, Richardson played Anita in the live action version of 101 Dalmatians, and Charlotte Selton in The Patriot. She plays Ethel Cripps in The Sandman, and is otherwise known for roles in the likes of Nip/Tuck, The Girl with the Dragon Tattoo, The Tudors (as Catherine Parr), Vampire Academy, Lady Chatterley, One Day, Renegade Nell and The Gentlemen.

Vinette Robinson plays Louisa McAdams

Vinette Robinson as Louisa McAdams in Suspect
Vinette Robinson as Louisa McAdams in Suspect. Channel 4 / Toon Aerts

Who is Louisa McAdams? Louisa is a firearms officer who has recently returned to active duty, and who has a contentious relationship with Susannah.

Where have I seen Vinette Robinson before? Robinson has had roles in a number of major series over the years, including Waterloo Road, Vera, Sherlock, Death in Paradise, Black Mirror, The A Word, Doctor Who, Code 404, Six Four, Boiling Point, The Lazarus Project and The Gathering. She has also appeared in films such as Star Wars: The Rise of Skywalker and The Pod Generation.

Richard E Grant plays Harry

Suspect
Richard E. Grant And James Nesbitt in Suspect

Who is Harry? Christina's mentor.

Where have I seen Richard E Grant before? Oscar-nominated for his role in Can You Ever Forgive Me?, the actor recently had a scene-stealing turn in the Disney Plus series Loki (as "Classic Loki"), and is otherwise known for roles in the likes of Withnail & I, Gosford Park, The Hitman's Wife's Bodyguard, Everybody's Talking About Jamie, Girls and Persuasion.

Niamh Algar plays Nicola

Niamh Algar
Niamh Algar plays Nicola in Suspect

Who is Nicola? Christina's wife.

Where have I seen Niamh Algar before? She played a key role in the devastating The Virtues, and has starred in MotherFatherSon, Pure, Raised by Wolves, Deceit, The Bisexual, Censor and Malpractice.

Antonia Thomas plays Maia

Antonia Thomas in Suspect.
Antonia Thomas plais Maia in Suspect

Who is Maia? A lap-dance club manager and the best friend of Christina, Danny's late daughter.

Where have I seen Antonia Thomas before? She's best known for her leading roles as Dr. Claire Browne in The Good Doctor, Evie in Lovesick, and as Alisha in Misfits. She's also starred in Sunshine on Leith, the anthology series Small Axe, The Musketeers and Still Up.

Sacha Dhawan plays Jaisal

Sacha Dhawan And James Nesbitt
Sacha Dhawan plays Jaisal in Suspect

Who is Jaisal? A drug dealer.

Where have I seen Sacha Dhawan before? He's played Orlo in the first two seasons of The Great, and starred in Doctor Who in the role of antagonist The Master. Other past projects have included Iron Fist, The Boy with the Topknot, The Prince, Dracula, Sherlock, Mr Selfridge and Wolf.

Sam Heughan plays Ryan

Sam Heughan
Sam Heughan plays Ryan in Suspect

Who is Ryan? Danny's ex-police partner.

Where have I seen Sam Heughan before? He's best known for playing Jamie Fraser in the time-travelling drama Outlander, a role he's held since 2014. He also has appeared in To Olivia, The Spy Who Dumped Me, SAS: Red Notice and The Couple Next Door.

Imogen King plays Christina

Who is Christina? Danny's estranged daughter who died in the first episode.

Where have I seen Imogen King before? She's known for The Bay, Clique, Darkest Hour, The Messenger and Hotel Portofino.

Suspect season 2 is available to stream in full now on Channel 4.

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