“ Borderline ,” a detective series from Lionsgate Television, will debut on the Roku Channel on Sept. 1 for U.S. viewers.

According to the official synopsis, the series follows “straitlaced detective inspector Philip Boyd of North Ireland as he finds himself working alongside his outspoken Republic of Ireland counterpart, detective inspector Aoife Regan. Despite their personal and professional differences, the two must collaborate to solve brutal crimes on the border.”

The cast includes Eoin Macken as Philip and Amy De Bhrun as Aoife. Lochlann O’Mearáin also stars.

“Borderline” is a new series created and written by John Forte. Robert Quinn directs the show, while Steve November and Mary Callery serve as executive producers. ShinAwiL and Further South Productions produced the series, in collaboration with Screen Ireland and Lionsgate Television. Lionsgate is handling international distribution. In the U.K. and Ireland, “Borderline” will debut on MGM+ on Sept. 2.

Macken is best known for his role as Doc in the 2016 “Resident Evil” film “The Final Chapter”, as well as Gavin in “La Brea,” which aired on NBC for three seasons from 2021 to 2024, and Karl in “Nightflyers,” which aired on Syfy and Netflix for one season in 2018.

De Bhrun played Steph Corbett in Seasons 5 and 6 of the ITV-produced police drama “Line of Duty,” which aired on BBC One. Her other notable roles include 2016’s “Jason Bourne” film, the AMC+ and Sundance Now series “Sanctuary: A Witch’s Tale” and “Blackshore”, and Ireland’s RTÉ. She will next appear in the Cillian Murphy-led film “Small Things Like These.”

“Borderline” is one of several international series that Lionsgate has acquired or co-produced. These include “Son of a Critch,” which airs on CBC in Canada and the CW in the U.S., and “Prosper” and “Population 11,” both of which are available on Stan in Australia.