Goofs

Reacher had a jacket when he got out of prison. He wasn't wearing or carrying a jacket walking to the diner were he was arrested, he didn't have the opportunity to acquire one before going into the prison.

In scene 21, after Roscoe has dropped him off in town, Reacher is walking along the street and his right boot tongue is sticking out, over his jeans. In the next shot, after he's then crossed the road and approaches the statue, it's back to normal.

His pant cuff obviously settled over the boot tongue due to jostling as he walked.

When Reacher is in the barber chair looking out the window, there is a gap between the shaving cream and his sideburn in the long shots, but the shaving cream is touching his sideburn in the closeups.

Reacher describes the bullets used to kill the first victim as "95 grain, subsonic." Typical subsonic 9mm rounds use 147 grain bullets. A 95 grain bullet would actually travel at higher-than-average velocity.

9mm doesn't mean only 9x19mm. It also refers to 9x17mm, aka .380acp. 95 grain bullets are available for this round, and are subsonic.

Reacher says that a 95 grain 9mm bullet is subsonic. The standard loading for a 9mm is either 115 grain or 124 grain. Both are supersonic. The lighter the bullet the faster it goes so a 95 grain bullet would definitely be supersonic.

Mr. Mosley, the barber, says his sister sang with Blind Blake a few times 'back in the day.' But since Blind Blake died in 1934, 88 years ago, this seems unlikely unless Mosley's sister is well over 100.

The Blind Blake subplot is faithful to the Lee Child novel "Killing Floor", published in 1997. At that time, the details of Blind Blake's death were shrouded in mystery and folk legend, and it was plausible that an elderly character could have interacted with a man who vanished about 60 years earlier. The producers of the miniseries presumably made a deliberate choice to faithfully include this anachronistic subplot rather than inventing something else that might upset fans of the books.

A minor criticism but Reacher has scarring on his abdomen following the Beirut bomb blast, mentioned in his military record and awarded the Purple Heart but there is not one scar on his body when stripped. The abdomen scars are shown in EP3 First Dance but not highlighted or referenced.

Reacher insists he came to Margrave because he heard Blind Blake died there. Since Margrave, Georgia is a fictional town, Blind Blake, a real blues musician, could not have died there. In fact, Blind Blake died in Milwaukee, Wisconsin, in 1934 and was buried in Glendale, Wisconsin. However, this was not widely known until 2011, and Lee Child published "Killing Floor" in 1997.

In the opening scene, the audience can witness the killer's hand and the gun moving up and down when shooting, which would make the shots very inaccurate and yet the victim is hit three times from a distance.

This is a demonstration of Newtons third law of motion, known as "recoil".

When Finlay makes the call to his ex-wife at around the 31' mark, one of the buttons of his vest is undone.

When Finlay is leaving the voicemail for his ex-wife, one of the buttons of his vest is unbuttoned.

Around 16:46, for about 5 seconds you can see several production crew and a moving boom mic in the reflection of Chief Detective Oscar Finlay's sunglasses.

The story is supposedly set in central Georgia, yet not a single person in the story speaks with a Georgia accent of the region. Moreover, in exterior shots, there is not a single longleaf pine tree to be seen, which is a ubiquitous tree in Georgia.

The Police had Jack turn and face the window, yet he was handcuffed with his hands in front of him. If Jack was so dangerous, he would have been handcuffed with his hands behind his back for the safety of the Officers.

When Reacher is in the barber-shop preparing for a shave, the barber is wiping the razor back and forth across the leather-block and turning over the sharp edge of the blade. The razor-blade needs to be turned over the back end to prevent the cutting edge from being damaged.