Continuity: When William Petersen is talking to his kid in the supermarket, the cereal boxes behind him on the shelves change between two shots. The items behind Kevin also change during the scene.

Factual error: While using the phone in his cell, Dr. Lecktor asks an operator to dial a Maryland area code, but is then connected to the University of Chicago.

Continuity: In the scene where Graham uses Freddy Lounds to plant a story about the Tooth Fairy in the Tattler, Lounds places a tape recorder on a desk. A few shots later, the recorder is back in Freddy's hand, and he places it on the desk again.

Continuity: When Dollarhyde is shot near the end of the film, he falls on the floor of the kitchen and a pool of blood spreads out from underneath him. In the next shot of his body on the floor, the pool of blood has disappeared.

Factual error: Dr. Lecktor's cell has the hinges on the inside of the cell. They should be on the outside so Lecktor can't compromise them.

Continuity: In the original theatrical version, Graham shoots six rounds at Dollarhyde from a gun that holds five rounds. [In the Director's Cut, one of the shots has been edited out. However, this is still valid for other prints of the film.]

Continuity: After Will has been to see Lecktor, he is standing near a set of traffic lights with Dennis Farina's character. In the next shot a cigarette mysteriously appears in Will's mouth that wasn't there in the previous shot.

Visible crew/equipment: Near the climax, Will Graham is sneaking through the woods, approaching Dollarhyde's house. In one shot, Graham steps more carefully and glances down; the camera is in front of him moving as he's moving. And for a couple of seconds, the camera dolly tracks are visible behind him, just to his left.