When Olivia first speaks to the victim who is in the shower, Olivia turns off the hot and cold water faucets by turning the handles in different directions. Dual-knob bath controls turn off and on in the same directions, to lower the likelihood of user-confusion causing accidental burns in the shower.
Harper says her Desert Eagle is a double action, this is incorrect. All .50 calibre IMI Desert Eagles are single action pistols. This means that if the hammer is not cocked pulling the trigger will not fire it. Whereas with a double action pistol pulling the trigger when the hammer is not cocked will cause the hammer to move backwards into the cocked position. Most semi-automatic pistols are double action, however a few like the Desert Eagle and the Colt 1911 are single action.
When Mrs. Cleary is on the phone with her husband in the interview room, her reflection from the mirror behind Alex shows that she is facing Alex. When the camera is on Mrs. Cleary, her back is to Alex.
The way Harper rapid-fires her Desert Eagle pistol shows plainly she's firing blanks, as there is almost no visible recoil from the discharges. The .50 calibre round is extremely powerful, and despite the heavy frame and weighted fore-end of the gun, it takes a noticeable amount of time to bring the point of aim back on-target after each shot, and she was shooting a tight group on the hanging target.
When Harper Anderson and Detective Benson are at the firing range, Anderson comments on the 14-round magazine she uses in her .50AE Desert Eagle, then hands it over to Benson as it is "illegal," saying her 8-round magazine is enough. In fact, only 7-round magazines are manufactured for the .50AE Desert Eagle. The clip that is handed to Olivia is not long enough to be a 14-round clip in single-stack, and not fat enough to contain .50 calibre rounds in a double-stack configuration. If she did have a 14-round magazine, it would protrude several inches from the bottom of the pistol, as the handgun is not designed to accept a double-wide magazine. Also, Anderson claims that the gun weighs about 40 ounces fully loaded; in reality, the .50AE weighs nearly 72 ounces with an empty magazine.
When the rape victim, Harper Anderson, has words with her rapist's attorney, she calls him "Mr. Klein". This is the only time that the lawyer's name is mentioned. The actor, Ned Eisenberg, who plays this attorney, is billed as "Rothberg". This same actor, however, appeared in the Payback (1999) as a "Jerry Kleinert", and in 13 episodes after this one as "Roger Kressler", an attorney.
Near the start, referring to the perp's habit of keeping items from his victims, Stabler pronounces "memento" as if it's the frequent misspelling "momento".