The international posters and US IMAX poster have various variations of the phrase 'The Final Chapter' as the tagline. However Antoine Fuqua in an interview while promoting the film has said a prequel and a sequel could happen if Denzel was still interested.

Reunites Denzel Washington with Dakota Fanning after Man on Fire (2004).

In the vineyard barrel room in Sicily with all guns trained on him, Robert warns the crime boss that he has 9 seconds to decide his fate. Although it seems far shorter, he actually lets 10 seconds pass before he springs into action.

This movie marks the fifth collaboration between Denzel Washington and director Antoine Fuqua after Training Day (2001), The Equalizer (2014), The Magnificent Seven (2016) and The Equalizer 2 (2018).

The hat worn by "Frank Conroy" in the film says 'Vienna Inn Est. 1960". This hat is from the Vienna Inn bar and restaurant located in Vienna, Virginia, not far from the CIA headquarters in Langley, VA. The Vienna Inn is a local landmark, famous for once being the top seller of Budweiser beer in the nation, and also famous for its chili dogs and wait staff with little patience for anyone.

Continuity

In the confrontation scene on the piazza when Robert McCall is appearing from behind the columns and walking toward Vincent Quaranta one of McCall's two guns is empty (the slide is locked in the open/back position) and a moment later the slide is closed when he hands over the guns to Quaranta .



Factual errors

After the initial confrontation, McCall sits and puts the Beretta to his head and you hear the gun click, indicating the hammer dropped and the gun is out of ammo. However, when that model (92f) is out of ammo, the slide locks back, contrary to that scene. After firing rounds, that pistol's hammer would be back ready to fire the next round, contrary to the scene showing the lowered hammer. Finally, for the gun to make the clicking sound indicating the hammer dropped and the gun is out of ammo, McCall would have had to have pulled the trigger, which he did not do. The sound was inserted in post-production to make the viewer believe McCall was not just contemplating suicide but attempted it.

Toward the beginning of the film when McCall shoots Lorenzo twice with a powerful long gun, he holds it low, cradling it in his hands. Normally the gun's kick would send it flying out of his hands. The gun barely twitches.



Incorrectly regarded as goofs

The film is set in the fictional coastal town of Altamonte, and not Altomonte a real, mountain village not situated at the coast. The filming location was Atrani, on the Amalfi coast.



Revealing mistakes

In the opening confrontation in Sicily, there are 10 shots fired from a 6 shot revolver.



Plot holes

The Camorra don't seem all that concerned about the raid on the vineyard cutting off the drug supply and losing all the money stashed at the villa.



Character error

Emma Collins, a trained CIA agent, takes a photograph of McCall using a smartphone with the camera shutter sound effect still enabled.

McCall knows he has been shot from the back but wastes precious seconds and ammunition shooting in front of him.

McCall does not apply pressure on his gunshot wound despite being trained as a field medic.