At some point during the first act of Robert Lorenz’s handsome but egregiously hackneyed “In the Land of Saints and Sinners,” which is maybe the 900th Liam Neeson movie about a weary hitman/rancher/fixer/truck driver/ex-cop/very tall person who decides to take matters into his own hands when some bad guys step over the line, the prolific Irish actor turns to one of his scene partners and sighs: “There’s more to me than this, and I’d like folks to see it.”

Needless to say, the first part of that sentence is much easier to believe than the second.

Cast here as a regretful assassin who tries to change his ways at the height of the Troubles (only to get mixed up with a trio of Ira terrorists who take cover in his quaint coastal village after a car bomb goes wrong), Neeson again reaffirms...