
What occurs when a body is discovered on the boundary between Northern Ireland and the Republic of Ireland? Essentially, two police forces need to cooperate to investigate, and this complex relationship is the focus of the new drama, Borderline.
The show first appeared on television last year, but ITV now has the rights and it will begin airing today. Eoin Macken and Amy De BhrĂșn play the main characters – two detectives with very different personalities who need to work together to solve cases, despite their disagreements. It promises to be a compelling watch!
The show primarily centers on how well the characters collaborate, but it also features a strong supporting cast. You’ll see actors from popular series like The Boys From County Clare, Blue Lights, and The Woman in the Wall, among others.
But who stars in Borderline, which has just come to ITV? Read on for everything you need to know.
Borderline cast: Who stars in the Irish crime drama?
Here’s the complete cast for Borderline. Keep scrolling to learn more about the key characters and where you might recognize the actors from.
- Eoin Macken as Detective Inspector Philip Boyd
- Amy De BhrĂșn as Detective Inspector Aoife Regan
- Lochlann O’Mearain as Jack Mullen
- Hugh O’Conor as CS James Casey
- Charlotte Bradley as CS Flynn
- Sophie Vavasseur as Aisling
- Craig McGinlay as Rev Adam
- 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
- Jack Hickey as Sean
- Adam Walker-Kavanagh as Garda Brady
Eoin Macken as Detective Inspector Philip Boyd

Who is Philip Boyd? He’s a Northern Irish detective who always follows the rules. His usual, very precise way of working is disrupted when he has to partner with Aoife.
Where have I seen Eoin Macken? Eoin Macken is famous for appearing in shows like Ransom Canyon, Merlin, The Night Shift, and La Brea.
Amy De BhrĂșn as Detective Inspector Aoife Regan

Who is Aoife Regan? Aoife and Philip are quite different. While Philip tends to be cautious, Aoife readily embraces risks, speaks her mind openly, and handles personal challenges with confidence.
Where have I seen Amy De BhrĂșn? Amy De BhrĂșn has appeared in several popular shows and films, including Blackshore, Line of Duty, Vikings, Coronation Street and Small Things Like These.
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2025-10-03 10:34