Borderline (2024 TV series)

Lore & Background

The series is written by John Forte and directed by Robert Quinn, with executive producers Steve November and Mary Callery. It is produced by Irish production company ShinAwil and UK-based Further South Productions, with funding from German channel ZDF and backing from Screen Ireland. Distribution is handled by Lionsgate. Filming took place in County Louth, including Dundalk, in 2023.

Reader's Guide

Borderline represents a collaboration between Irish and Northern Irish police forces, reflecting the unique challenges of policing a contested border. The series stars Eoin Macken as Detective Chief Inspector Philip Boyd of Northern Ireland and Amy De Bhrún as Detective Inspector Aoife Regan of the Republic of Ireland, who must put aside differences to solve crimes straddling the border. The cast also includes Lochlann O'Mearain, Hugh O'Conor, Charlotte Bradley, Sophie Vavasseur, Craig McGinlay, and Jack Hickey. The series premiered in the United States on Roku on 1 September 2024, in the United Kingdom on MGM+ from 2 September 2024, and later on ITV1 from 3 October 2025. Its significance lies in its focus on cross-border cooperation in a region with a complex political history.

Did You Know?

• The series is set on the border between Ireland and Northern Ireland.
• The series premiered in the US on Roku on 1 September 2024.
• Funding came from German channel ZDF.

The Cross-Border Premise

The narrative engine of Borderline rests on a deceptively simple yet politically charged idea: a single crime cannot be neatly contained within one jurisdiction when it occurs right on the line separating the Republic of Ireland from Northern Ireland. The series positions two detectives from opposing police services—Detective Chief Inspector Philip Boyd, representing Northern Ireland's Police Service, and Detective Inspector Aoife Regan, representing the Republic's Garda Síochána—as the central figures who are forced to set aside institutional rivalry and personal friction. Their partnership is not born of convenience but of necessity, because the case they are investigating physically straddles the border, meaning neither force can solve it alone. This structural constraint transforms what might be a routine procedural into a story about cooperation across a historically fraught divide. The show, described as an Irish and Northern Irish police procedural, uses the border not merely as a backdrop but as the central dramatic tension, making every clue, every witness, and every piece of evidence a potential point of jurisdictional conflict. The September 2024 broadcast introduced this premise to audiences who would follow the two leads as they navigate both the crime and the politics of working together.

The Ensemble Cast

Borderline assembles a substantial supporting ensemble around its two leads, Eoin Macken and Amy De Bhrún, who anchor the series as DCI Philip Boyd and DI Aoife Regan respectively. The cast extends well beyond the central partnership, weaving in a web of characters who populate the investigative world. Lochlann O'Mearain appears as Jack Mullen, while Hugh O'Conor takes on the role of CS James Casey. Charlotte Bradley plays CS Flynn, and Sophie Vavasseur is cast as Aisling. Craig McGinlay brings the character of Rev Adam to life, and Jack Hickey appears as Sean. The supporting roster also includes Charlie Maher as Joe Dooley, Ciaran McMahon as Captain, Amy Molloy as Lottie Mullen, Paul Reid as DC Maguire, Siobhan O'Kelly as Roise Boyd, Barry John Kinsella as Ian Walsh, Sarah Carroll as Roisin, and Adam Walker-Kavanagh as Garda Brady. This breadth of named roles suggests a narrative that moves through multiple communities and relationships rather than staying locked to a single location or pair. The inclusion of both Garda and Police Service personnel among the supporting cast reinforces the show's commitment to depicting the border as a shared, lived space rather than an abstract line on a map.

Production & International Partnership

The making of Borderline reflects a genuinely multinational production effort that bridges the Irish and UK television industries while drawing on German public broadcasting funding. John Forte penned the script, and Robert Quinn helmed the direction, with Steve November and Mary Callery serving as executive producers. The production was a joint venture between ShinAwil, an Irish production company, and Further South Productions, a UK-based firm. Financial backing came from ZDF, the German public television channel, alongside support from Screen Ireland, the Irish government's screen agency. Distribution rights were handled by Lionsgate, the major international studio. Principal photography took place in 2023 in County Louth, in the Republic of Ireland, with Dundalk among the specific filming locations. This geographic choice is thematically apt, as Louth sits directly adjacent to the Northern Irish border, allowing the production to capture the physical reality of the setting rather than relying on stand-ins or studio work. The convergence of Irish creative talent, UK production infrastructure, German public funding, and global distribution through Lionsgate positions the series as a case study in how smaller-market television can achieve international reach through layered partnership structures.

Broadcast & Platform Strategy

Borderline's path to screen illustrates a staggered, multi-platform release strategy that prioritized streaming before traditional linear television. In the United States, the series found its first audience on Roku, premiering on 1 September 2024. Just one day later, on 2 September 2024, UK viewers gained access through the MGM+ streaming service. This near-simultaneous transatlantic launch on two different digital platforms underscores the show's positioning as a streaming-first property rather than a broadcast network staple. The series then made its way to linear television in the United Kingdom, where ITV1 aired it from 3 October 2025, more than a year after the initial streaming debuts. This extended gap between the streaming premiere and the broadcast airing is notable and suggests a deliberate windowing strategy designed to maximize the value of the streaming exclusivity period before releasing the content to a broader, free-to-air audience. The involvement of Lionsgate as distributor, combined with the ZDF funding and Screen Ireland backing, created a distribution pipeline that could support this kind of phased rollout across multiple territories and platform types. For fans of the series, the staggered timing meant that the show entered the cultural conversation in waves rather than all at once.