During the bar scene, Liam Neeson mentions having a drink with Mickey Featherstone. In real life, Mickey Featherstone was a member of the New York City Irish-American gang called The Westies, based out of Hell's Kitchen.
The film shares many similarities to Sam Mendes' Road to Perdition (2002); a longtime, trusted hitman (Tom Hanks, Liam Neeson) is put at odds with their boss (Paul Newman, Ed Harris) when their sons make things personal (Daniel Craig, Boyd Holbrook) and target their own children (Tyler Hoechlin, Joel Kinnaman). As a result, a master assassin (Jude Law, Common) is dispatched to get rid of them. Both films also conclude at a family cabin.
Listed among the cast when the film was in production, Nick Nolte had much of his material cut from the final release. As such, he is uncredited for his brief appearance.
Liam Neeson has two sons in real life named Micháel and Daniel (Danny), which are the names of the two boys in the film Run All Night
At one point during a street chase, Jimmy (Liam Neeson), runs past a billboard for Mad Max: Fury Road (2015). That film was also produced by the same studio (Warner Bros.), was scored by the same composer (Tom Holkenborg), and the trailer for the film was attached to all release copies of this film.