Continuity mistake: When Sam finds the list of "Guitar Hero" receipts in Corporal Valdivia's house, he flips the top page to the bottom of the pile, and in the next shot he has the following page in his hand, without having moved. (00:06:25)
Continuity mistake: At the beginning a person is shot in the back of the head during a surveillance. The camera is filming a man and a woman on a boat at a marina. The feed is being played in real-time on the laptop. The killer starts to gather all the recording equipment, including dismounting the camera off the stand. The killer called the man on the boat to say "it's done". The computer screen shows the man on the boat leaving the boat even after the camera was dismounted.
Continuity mistake: In the car chase at the beginning of the episode, Earl Mayfield's pick up smashes into the SUV driven by Conrad Weaver. Part of the bumper comes adrift and is seen hanging low. When Weaver's SUV flips over, Mayfield turns around and drives back up to him. As he approaches the bumper has reattached itself. (00:01:00)
Continuity mistake: Sam and Hetty are talking at her desk. There are two cups of tea on the desk. The ear of one of the cups is on the left in one shot, then on the right on the next.
Continuity mistake: When Deeks is shot in 2-17 "Personal", his records show no next of kin. However in later episodes he has a mother.
Continuity mistake: After the drive-by shooting at the Federal Building, when Owen and Sam escort the defector and his girlfriend into the sedan, the license plate number is "5GOI417" which soon changes to "5PCI294" when Sam drives backwards. Then it changes back to "5GOI417" when Owen and Sam leave the car, and yet it's "5PCI294" again when Owen points his gun at the camera.