Audio problem: There are American crows (Corvus brachyrhynchos) calling in the distance during the initial pursuit for Quan in the forest behind the Belfast farmhouse, right after the trap door scene ends and we see two of Hennessy's men share a look. American crows do not exist in Ireland - only hooded crows, carrion crows, rooks, ravens and choughs.
Revealing mistake: During the final fight scene in the bomber's apartment, Chan picks up a TV and smashes it on the guy on the floor. When he picks up the TV, there are no cords connected to it at all. No power cord, no cable wires, nothing. (01:36:25)
Other mistake: When Hennessy shoots McGrath in the leg (twice), there is no blood. McGrath grabs his thigh, then writes the names of the bombers, and there's still no blood anywhere.
Continuity mistake: When Mr Quan meets the commander the paperwork, money, chairs and even Mr Quan are all in completely different places multiple times. (00:19:05)
Revealing mistake: When Hennessy is confronting McGrath, he shoots 3 bullets from his pistol and also hits him in the face with the butt of the gun. There is no magazine/clip in the pistol. (01:19:30)
