When they are given the Social Security number of a teenager who was killed two years ago, Reese and Finch begin to question the infallibility of The Machine. Meanwhile, Finch flashes back to The Machine's origin and how it was developed.
Starting with this episode, a "saga sell" title sequence is used. The opening features previously seen moments from "Pilot", this episode, and "Mission Creep", with Michael Emerson's voice over, and is designed to introduce the premise of the show to viewers. It is not unusual for such elements to be introduced in the second episode, which is the first to reflect changes made in response to the pilot.
Interview notes collected by Maxine Angelis in her search for the man in a suit ("Bury the Lede") confirm that Reese in fact did not kill the assassins in the elevator but only kneecapped them, as implied by Detective Terney.
Reese shoots three people, one of them (the hit man) twice. It is unclear if the hit man is killed during the second shooting since he is wearing a vest and a head shot is not discernable.