Despite being an American, Robert Lorenz decided to keep the film as authentically Irish as possible, not only employing an all-Irish cast, but also employing an all-Irish crew.
When Finbar rides with Curtis in his car, Finbar talks him about the Fomorians, giants who were the builders of the Ireland hills. The Fomorians, Fomori or Fomoire are a real-life legend of Irish mythology, sea deities who are believed to be the first inhabitants of Ireland until they were defeated by their archenemy Tuatha Dé Danann, the god-race ancestors of the actual Irish.
When Finbar is looking through Kevin's record collection, the album he has in his hands is "Live! In Europe" by Rory Gallagher, released in 1972.
Liam Neeson and Jack Gleeson are 40 years apart: Neeson was 70 and Gleeson was 30 at the filming (2022).
Liam Neeson and Ciarán Hinds previously starred in Excalibur (1981) and Silence (2016) together, but never shared a scene in either movie.