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.
Revealing mistake: Callan chases bad guy Ethan through the yard. Ethan runs down a set of stairs and towards the camera, before hiding between tanks. While running, Ethan's face is fully visible and it is very clear that it is not actor Charles Esten.
Other mistake: Hetty's image appears in a mirror talking to Kensey who is getting changed for an undercover assignment when Kensey walks out of the changing area the mirror is on her right but Hetty is in front of Kensey and could not have appeared in the mirror.
