As McGee continually gathers up and stacks his booklets during the initial meeting with the team, the stacks vary in size and position as the camera cuts to different angles. This is because the team kept grabbing booklets and to examine, causing McGee to readjust the shrinking number of booklets.
The close-up view of Garcia's missing person search reveals that each of the last nine victims on the list were given identical stats - 25 years of age, 105 lbs, and 5'2" tall (both men and women). Additionally one woman's first name is listed as Carl.
Identical scenes from the Charlie Chaplin movie shown at the beginning and the end of the episode have different accompanying music.
When Maggie comes to the first intersection in the long hallway, she looks down both side passages before choosing left. As she begins to move, a hand is visible on the lower left side of the screen.
Detective McGee tells JJ that there are " less vagrants, less prostitutes, less junkies strung out on the corners." He should have said "fewer" instead of "less." Fewer is used when describing plural nouns; less is used for singular ones.