Sergeant Gerry Boyle is a small-town Irish cop with a confrontational personality, a subversive sense of humor, a dying mother, a fondness for prostitutes, and absolutely no interest whatsoever in the international cocaine-smuggling ring that has brought straight-laced FBI agent Wendell Everett to his door.
Brendan Gleeson plays Gerry Boyle, a garda sergeant in a small village in Connemara outside Galway who to put it mildly is a bit of a git but a funny git, this movie made me laugh quite a lot because maybe I understood it by better by being Irish but it's over the top with it's storyline but maybe nothing else, a very enjoyable movie and with a good ending.
There are good performances from Mark Strong, Liam Cunningham and Don Cheadle and from the the Irish cast but Brendan who taught at my secondary school before acting got him is brilliant and on top form.
Like Gerry says "Like the fat man said, if you have to be careful not to drink too much, it's because you're not to be trusted when you do".
The guard in the title refers to the national police force of the Republic of Ireland who are called Garda Siochana which literally means "Guardians of the Peace".