Mark Bonnar has spent two decades building one of British television’s most reliable filmographies—and he did it without ever becoming a household name. From his morally compromised lawyer in Guilt to his detective work in Shetland and his return to Line of Duty’s institutional corruption dramas, Bonnar has become the actor you notice in the best crime series.

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Born: 19 November 1968, Edinburgh, Scotland · Known For: Guilt, Shetland, Line of Duty · Debut TV: Rebus (2001) · Notable Roles: Max in Guilt, Duncan Hunter in Shetland · Recent Streaming: Unforgotten on Prime Video

Quick snapshot

1Confirmed facts
  • Max McCall in Guilt (BBC Scotland, 2019–2024) (Wikipedia)
  • Duncan Hunter in Shetland (BBC One, ongoing) (Wikipedia)
  • DCC Mike Dryden in Line of Duty series 2 and 7 (RTE)
2What’s unclear
  • Exact season count for Shetland appearances
  • Full cast details for Line of Duty series 7
  • US streaming availability beyond listed platforms
3Timeline signal
  • Line of Duty series 7 arrives on BBC One in 2027 (RTE)
  • Dept. Q premiered on Netflix in 2025 (Wikipedia)
  • Ludwig series 2 filming joined September 2025 (Wikipedia)
4What’s next
  • Return as DCC Mike Dryden in Line of Duty series 7 after 13-year gap (RTE)
  • New BBC series Ludwig continues with his character Gareth Fisher (RTE)
  • Recent appearance in The Celebrity Traitors (RTE)

This table summarizes the essential facts about Mark Bonnar’s career and background.

Label Value
Full Name Mark Bonnar
Birth Date 19 November 1968
Birthplace Edinburgh, Scotland
Notable TV Debut Rebus (2001)
Breakout Show Guilt (2016)
Age (2026) 57
Bafta Win 2017 – Best Actor, Bafta Scotland (Unforgotten)

What is Mark Bonnar famous for?

Mark Bonnar is a Scottish actor who has built a reputation across two decades of British television, with particular strength in crime dramas and thrillers. Born in Edinburgh on 19 November 1968, Bonnar spent his early career focused on theatre before transitioning to screen work—a background that gives his performances a grounded, deliberate quality distinct from actors who come up through television training programs.

His breakthrough came through consistent roles in some of the UK’s most acclaimed series. The Big Issue noted that Bonnar himself has called Line of Duty “the big change for me” in his career, marking a shift from theatre work to high-profile television after his time on Shetland. That progression—from a decade of stage work to the fast-paced police procedural that became one of British television’s most talked-about shows—helps explain why his performances feel so considered.

Career trajectory

The pattern is clear: Bonnar has increasingly been cast in series where characters face impossible decisions under pressure. From Shetland’s island detective work to Guilt’s Edinburgh crime cover-up to Line of Duty’s institutional corruption, the actor has become a go-to choice for morally compromised but sympathetic figures.

Early career

Bonnar’s television debut came in Rebus in 2001, a long-running adaptation of Ian Rankin’s crime novels set in Edinburgh. The role established early connections between Bonnar and the Scottish crime drama format that would define his career. From there, appearances in Casualty as Bruno Jenkins and other series built his screen credits before the major opportunities arrived.

Breakout roles

The two roles that cemented Bonnar’s place in British television are his performances as Max McCall in Guilt and Duncan Hunter in Shetland. Both series allowed him to play characters navigating morally complex situations—Max as a lawyer covering up a killing, Duncan as a detective balancing professional duties with personal connections in the remote Shetland islands.

What is Mark Bonnar’s most famous TV show?

Guilt represents what many consider Mark Bonnar’s signature role—and for good reason. The BBC Scotland series, which aired from 2019 through 2024, gave him the lead as Max McCall, an unscrupulous Edinburgh lawyer who, alongside his brother, covers up a killing that occurs after a wedding. Written by Neil Forsyth, the show blends dark comedy with thriller tension, and Bonnar’s portrayal of Max anchors every episode.

Guilt overview

The series spans four seasons, with new entries arriving in 2021, 2022, and 2024, cementing Guilt as one of BBC Scotland’s flagship drama productions. According to Roku’s streaming platform guide, the show is classified as TV-MA drama, crime, and thriller content—appropriate given its themes.

Where to watch Guilt depends on your region. US viewers can access it through PBS, Prime Video, and Apple TV via Roku, while UK audiences find it on BBC iPlayer. BBC Scotland’s official trailer describes the premise simply: “Two brothers seem to get away with a crime—but soon discover they can trust no-one, including each other.”

Critical reception

Guilt launched Bonnar into wider recognition, and the show’s continued production across four seasons demonstrates both critical and audience appetite for his work in this format. While the series has not received major award nominations, its sustained run and Bonnar’s central performance suggest the role has become definitional for his career.

“The big change for me was Line of Duty.”

— Mark Bonnar in The Big Issue interview

What else has Mark Bonnar been in?

Beyond Guilt, Bonnar’s career spans an impressive range of British television. His work in crime and detective series has been particularly consistent, with recurring roles that span multiple seasons and occasional appearances in more limited-run productions.

Shetland

Bonnar plays Duncan Hunter, a regular character in the BBC One detective series Shetland. The show, available on Apple TV, follows detectives working in the remote Shetland islands off Scotland’s coast. According to Apple’s entertainment snapshot, Shetland remains one of BBC One’s most-watched drama offerings with a 2025 listing confirming ongoing production.

Unforgotten

In Unforgotten, Bonnar played Colin Osborne in the first season of this cold case drama. The role earned him the 2017 Bafta Scotland award for Best Actor in Television, according to The Big Issue. The series is now available on Prime Video, making it accessible to streaming audiences looking to see more of his work.

Why this matters

The breadth of Bonnar’s credits reveals an actor equally comfortable in long-running procedural dramas and limited series experiments. Whether playing a detective across multiple Shetland seasons or anchoring Guilt’s complex moral universe, his work tends to focus on institutions under pressure—police, legal systems, media—where individual choices carry weight.

Other notable appearances

Beyond his main series work, Bonnar has appeared in Casualty (as Bruno Jenkins), Inside No. 9, Home Fires, and various other British productions. His recent work includes Netflix drama Dept. Q, where he played Lord Advocate Stephen Burns in 2025, and The Celebrity Traitors. He also joined BBC’s Ludwig in September 2025 as newspaper editor Gareth Fisher for series 2.

Bottom line: What this means: Bonnar has described Shetland as “the very first TV thing I did after being in the theatre for 10 years”—a detail that underscores how the series represented a pivotal career transition.

Who did Mark Bonnar play in Line of Duty?

Mark Bonnar played DCC Mike Dryden in Line of Duty series 2, which aired in 2014. Dryden was a Deputy Chief Constable whose character arc involved corruption investigations—fitting perfectly into the series’ central theme of institutional misconduct and the detectives pursuing it.

Episode details

In series 2, Dryden’s character became embroiled in the larger conspiracy the series was building. According to RTE’s entertainment coverage, his character was ultimately arrested for perverting the course of justice—a fate that fits the show’s pattern of powerful figures facing consequences.

Character arc

What’s notable is that Bonnar’s Dryden is not simply corrupt—he occupies a position where institutional loyalty and personal ethics come into direct conflict, a tension the actor has handled in his other work as well.

The implication: After more than a decade since his original appearance, RTE reports that Bonnar will reprise the DCC Mike Dryden role in Line of Duty series 7, set to air on BBC One in 2027. The return comes 13 years after his initial appearance, making it one of the longer gaps for a returning character in a series known for its complex continuity.

“Shetland was the very first TV thing I did after being in the theatre for 10 years.”

— Mark Bonnar in The Big Issue

Bottom line: Mark Bonnar has quietly become one of British television’s most reliable actors in morally complex roles. For crime drama fans, Guilt remains the essential starting point—the role that brought everything together. For Line of Duty followers, the 2027 return as DCC Dryden offers a rare continuation. Shetland watchers can enjoy his ongoing work as Duncan Hunter, while those exploring his back catalog will find consistent quality across Unforgotten, Dept. Q, and his earlier work.

What TV shows with Mark Bonnar are on Netflix?

Netflix viewers in the UK and internationally can access Mark Bonnar’s work through several titles, with Dept. Q representing his most recent major streaming appearance. The crime drama, which premiered in 2025, casts him as Lord Advocate Stephen Burns—a role that places him within another institutional corruption narrative, consistent with his broader career pattern.

Netflix titles

Dept. Q (2025) stands as Bonnar’s primary Netflix original credit. The show, based on a popular crime novel series, follows a detective team investigating cold cases, with Bonnar playing a high-ranking legal official connected to the central mystery. The series benefits from his established ability to convey institutional authority while hinting at moral complexity.

For international viewers, Guilt appears on multiple platforms including Netflix regional variants in some territories, though availability varies by region. Checking local Netflix libraries or platforms like Prime Video will provide the most accurate information for specific geographic areas.

Other platforms

The broader picture of where to watch Mark Bonnar shows includes several platforms: Shetland on Apple TV (BBC One’s official streaming home), Unforgotten on Prime Video, Guilt on BBC iPlayer (UK), PBS and Prime Video (US). WHYY’s streaming guide confirms Guilt’s US availability through their partner platform as well.

This platform distribution reflects a common pattern for British crime dramas: UK broadcast first with BBC services, then gradual international rollout through established streaming partners. Bonnar’s work fits neatly into this distribution model, with each major role appearing on platforms appropriate to its audience reach.

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Mark Bonnar excels as authoritative figures in British crime dramas like Line of Duty and Shetland, explored in detailed Line of Duty and Shetland guide with streaming options.

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Frequently asked questions

What are Mark Bonnar’s movies?

While much of Bonnar’s career has focused on television, he has appeared in film productions including work by major studios. IMDb records show appearances in productions such as Assassin’s Creed IV: Black Flag (voice work), though his primary output remains television drama. For film credits, checking his official IMDb page provides the most current and complete listing.

Was Mark Bonnar in Trainspotting?

No confirmed record shows Mark Bonnar appearing in Trainspotting (1996) or its sequel Trainspotting 2 (2017). His television debut came later in Rebus (2001), and while both productions share Scottish connections, the cast lists for the Trainspotting films do not include him.

What role did Mark Bonnar play in Traitors?

While Mark Bonnar has appeared in recent celebrity reality productions, there is no confirmed record of him playing a role in the drama series Traitors (2019-2023). The drama, which starred Emma Appleton and · , focused on post-war Britain and did not feature him as a cast member according to available credits.

Is Mark Bonnar in Doctor Who?

No evidence confirms Mark Bonnar’s involvement in Doctor Who across its modern era (2005-present) or classic run. His credits focus primarily on crime dramas and limited series, with no documented appearance in the long-running sci-fi programme in available sources.

What is Mark Bonnar’s role in Inside No. 9?

Mark Bonnar appeared in Inside No. 9, the anthology series created by Steve Pemberton and Reece Shearsmith. As an anthology show with different stories each episode, specific character names and plot details depend on which episode he appeared in. Checking episode guides for Inside No. 9 will identify his exact role and storyline.

Has Mark Bonnar appeared in Home Fires?

Home Fires (2015-2016) was a period drama about a Women’s Institute group during World War 2. Mark Bonnar is listed among its cast, though the show’s primary ensemble focused on female characters. His specific role and episode appearances can be confirmed through official cast listings.

What podcasts feature Mark Bonnar?

Actor podcasts and interviews featuring Mark Bonnar appear across various platforms, including promotional appearances for his television work. Major UK broadcasters and entertainment outlets often publish interview content with him discussing his roles in Guilt, Shetland, and other series. Specific podcast appearances would need to be verified through current platform listings.

Summary

Mark Bonnar has quietly assembled one of British television’s most consistent filmographies without ever becoming a household name. His appeal lies in reliability: whether playing a corrupt lawyer in Guilt, a steady detective in Shetland, or an institutional figure caught up in Line of Duty’s conspiracies, he brings the same quality of controlled intensity to each role. For crime drama enthusiasts, the implication is clear: any series featuring Bonnar is worth your attention, particularly if moral complexity and institutional pressure are on the menu. With his Line of Duty return in 2027 and continued work across BBC productions, his profile shows no signs of declining.