When CIA Officer Weston and the FBI come to take FSB Officer Antonov into custody, they neglect to ask for the flash drive that Nolan had found in his shop.
Nolan is in a shootout with the two Russians, and the woman they are after is in the back of his police car. His gun is in his right hand, but when he reaches in to pull the woman out, the gun disappears. When they are both out of the car, Nolan is holding the gun again.
The name of the female Russian agent is given as Katerina Antonov. In the Russian language, her family name would be the feminine form Antonova, not the masculine form Antonov.
Harper finds the silver Civic used by the serial killer in the series with the California license plate 4PCI335. Later in the episode, at evidence lock up, a dark colored Scion can be seen with the exact same license plate.
The license plate on the Honda Harper is checking out at a crime scene is used again on a different make and model car in the evidence lockup when Bailey is getting up off the ground after a fight. The audience was told the other car was burned.
John Nolan and Bailey Nune get on an elevator at a hospital which, according to the elevator control panel, has six floors. Even so, the two converse for over a minute and twenty seconds while the elevator descends six floors at most.
On her first day back to work after her maternity leave, Kamar de los Reyes hands Alyssa Diaz a stack of files. He tells her they are the backlogged cases 23 through 60. She reacts by saying, "That's 37 cases." However, there would be 38 cases in the stack.