Dept. Q is a British crime thriller series that premiered on May 29, 2025, on Netflix. Scott Frank and Chandni Lakhani has created the series from the Danish author Jussi Adler-Olsen's book series released between 2007 and 2021. It is produced by David Brown and executive produced by Scott Frank, Andy Harries, and Rob Bullock.
The nine-part series is directed by Scott Frank and Elisa Amoruso, while Chandni Lakhani, Scott Frank, Stephen Greenhorn, and Colette Kane serve as its writers. The official synopsis of Dept. Q, as per Netflix, reads:
"A brash but brilliant detective (Matthew Goode) leads an Edinburgh cold case unit in this tartan noir by the writer and director of "The Queen's Gambit."
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Matthew Goode and Kelly Macdonald star in Dept. Q
1) Matthew Goode as Carl Morck

Matthew Goode plays the protagonist named DCI Carl Morck, a senior police officer who is tasked with setting up and leading the cold case unit, Department Q, in Edinburgh. Carl is haunted by his past where his reckless actions led to the death of a fellow officer and left his partner paralyzed for life.
Goode gained prominence by starring in Woody Allen's psychological thriller film Match Point, opposite Jonathan Rhys Meyers and Scarlett Johansson. His other notable film credits include A Single Man, The Imitation Game, Downton Abbey, and The Sense of an Ending, Burning Man, to name a few.
The 47-year-old actor played Antony Armstrong-Jones, 1st Earl of Snowdon in The Crown and the state prosecutor Finley 'Finn' Polmar in The Good Wife. He also portrayed leading roles like Stanley Mitchell in Dancing on the Edge, George Wickham in Death Comes to Pemberley, and Matthew de Clairmont in A Discovery of Witches.
In 2022, he starred as a producer named Robert Evans in the biographical drama series The Offer. This miniseries detailed the production of Francis Ford Coppola's 1972 masterpiece, The Godfather.
2) Kelly Macdonald as Dr. Rachel Irving

Kelly Macdonald essays the role of Dr. Rachel Irving, a police therapist who steps in for Dr. Sonnenberg. She works with Morck to deal with the emotional repercussions of his past actions.
Macdonald's first film role was playing Diane Coulston in Danny Boyle's black comedy film Trainspotting in 1996. She went on to star in No Country for Old Men, Anna Karenina, Gosford Park, Elizabeth, Finding Neverland, The Hitchhiker's Guide to the Galaxy, Harry Potter and the Deathly Hallows – Part 2, among others.
She appeared as DCI Karin Parke in the 2016 episode, titled Hated in the Nation, from the anthology series Black Mirror. She also played Margaret Thompson in the period drama, Boardwalk Empire.
Kelly earned widespread recognition for playing DC Sarah Weitzmann in the critically-acclaimed show Giri/Haji. Furthermore, she had guest starring roles in the supernatural horror series Truth Seekers, biographical comedy series Urban Myths, and Disney+'s sci-fi series Star Wars: Skeleton Crew.
3) Chloe Pirrie as Merritt Lingard

In Dept. Q, Morck investigates the disappearance of Merritt Lingard, portrayed by Chloe Pirrie. She is a prosecutor from Edinburgh, who was abducted four years before the start of the series.
Pirrie is a Scottish actress who has worked in films like Burn Burn Burn, Emma, Kryptic, Kindred, and Blood Cells.
She previously worked with Scott Frank in the period drama series, The Queen's Gambit. She is also well-known for her performances in shows like Hanna, Brief Encounters, Troy: Fall of a City, Temple, Carnival Row, and The Crown. In 2022, she starred in the true crime drama series Under the Banner of Heaven, co-starring Andrew Garfield.
4) Alexej Manvelov as Akram Salim

Alexej Manvelov plays Akram Salim, a Syrian cop who relocates to Edinburgh and joins Morck's team in Dept. Q.
Manvelov is a Russian-born Swedish actor. He starred in the Swedish disaster war movie The Unthinkable and had a leading role in the 2023 film A Day and a Half. From 2020 to 2023, he played Teddy in the thriller drama Top Dog.
He also appeared in the highly-acclaimed historical limited series Chernobyl. He played Alexei Petrov for 8 episodes in the political thriller Jack Ryan and worked in the Chris Pine-starrer The Contractor in 2022.
5) Leah Byrne as Rose Dickson

As part of Morck's team, detective Constable Rose Dickson, played by Leah Byrne, is determined to prove herself after a mental health crisis has held her back from advancing in her career.
Leah Byrne is a Scottish actress who has worked in television shows like Call the Midwife, Deadwater Fell, The Last Bus, Dog Squad, and Nightsleeper.
Also read: Netflix's Dept. Q is Scott Frank's tribute to British procedurals (Exclusive)
Supporting cast members of Dept Q.

The series also features a long list of supporting characters which are mentioned below:
- Kate Dickie as Moira Jacobson
- Steven Miller as Sam Haig
- Tom Bulpett as William Linguard
- Catriona Stirling as DC Wilson
- Paul Ellard as Press
- Aron Dochard as DC Clark
- Michelle Duncan as Dr. Fiona Wallace
- Kai Alexander as Lyle Jennings
- Nolan Willis as Charlie Bell
- James Macnaughton as Dennis Piper
- Nicholas Ellard as Shopper
- Jamie Sives as DI Hardy
- Alec Newman as Paul Evans
- Kim Allan as Chloe Evans
- Angus Miller as Colin Cunningham
- Coseama Cook as Child Merritt Lingard
- Douglas Russell as Graham Finch
- Shirley Henderson as Caroline Kerr
- Mark Bonnar as Stephen Burns
- Jason Alan Staines as Man in Therapy
- Patrick Kennedy as Liam
- Billy Clements as Ed Soloman
- Lauren Grace as Junkie
- Lily Knight as Caroline Kerr
- Martin Farrell as Police Officer
- Frank Gilhooley as The Creature
- Paddy Towers as Teenage William
- Chris Forbes as Junkie #1
- James Watson as Reporter
- Paul Candelent as Detective
- Conor Berry as Barry
- Nandi Hudson as Catriona
- Finlay Shack
- Deborah Arnott as Reporter
- Jackson Reid as Teenage Sam Haig
- Alan Berkley as Police Officer On Ferry
- Andrew Ellard as Youth worker
- Adam Kerr as Boy on bus
- James Matheson as Gardener (uncredited)
- Ryan James Mack as Court Attendee (uncredited)
Watch all epsiodes of Dept. Q exclusively on Netflix.