Plot hole: In episode "And Here's To You, Mrs. Azrael": They state that the heart monitor on "Nicole" never showed any movement at all as she was being smothered, because the killer swapped it out and put it on herself. When Mrs. Rollins was smothering her daughter thinking it was Nicole, her heart rate would have raced and her blood pressure would have gone up a little as she strained to hold the bag over her face. The monitor would have picked that up.

Factual error: Season 3, episode 49 (Not What It Looks Like). Breaking glass with sound is possible, but would not work as depicted in the episode. First, in order to break the glass, you have to force the glass to vibrate at its natural frequency - that is, the frequency at which it would vibrate if it were tapped. Each piece of glass has its own natural frequency, depending on a range of factors including size, chemical makeup, shape, hardness, and manufacturing methods. No single frequency would shatter all the glass in the store at the same time. Finally, in order to break the glass the piece has to be closed-ended. You can't shatter a plate of glass with sound (nowhere for the sound waves to resonate). Please see http://www.madsci.org/posts/archives/feb98/887203231.Ph.r.html

Continuity: Season 3, Episode 11 (Raising Shane) Just as Casey is caught we see Detective Flack tackle him to the ground. The moment before Danny jumps on top of Casey we see that he is lying on his side. Yet when the camera changes position he is lying on his front.

Plot hole: In episode "Silent Night": When the mother checks on the baby in the first scene, you see the killer knock over the snow globe. The mother wouldn't have heard it since she was deaf, but she would have felt the vibration on the hardwood floor from the heavy object hitting the floor.

Other: On May 17, 2006, the episode titled "Charge of This Post", there is a scene where they are looking at Mac Taylor's DD214 form and they have the word separation misspelled. It says "Enlisted Record and Report of Seperation Honorable Discharge."

Continuity: In Episode "Happily Never After": In the opening when the CSI team is looking at the puncture wound of Fiona Chisolm, there is no blood coming from the wound. It is actually mentioned that there is no blood. Then it is determined that she was dead for about 6 hours, but now there is an L-shaped blood drip pattern to the chest wound.

Factual error: "The Thing About Heroes" When Mac has a flashback to an incident when he was 14 years old (in the 1970s) and gives the money to Bobby Toole the twenty-dollar bills all have the large 20 on the back side. This was not issued until 2004.

Plot hole: In the episode "Right Next Door," Mac was showing the air duct and saying that the fire would have traveled down the vent to the vacant apartment. The vent was shiny and new looking when it should have been filled with black soot with the amount of fire that traveled down it.

Continuity: In Episode 4-03 You Only Die Once In the beginning of the episode when Flack calls in the address of the apartment he calls in the address of 260 W 72nd Street, however, when the burglar is shown repelling down the side of the building the address on the front of the building is 535.

Factual error: Season 3 Episode 54 (Murder Sings The Blues). Several police and crime lab personnel are in the train car looking at the dead girl and discussing the possibility that this death could be the result of a bio-hazard or chemical hazard. Later in the episode, ebola and anthrax were discussed. These are level 3/4 hazards which require Hazmat suits and oxygen supplies. At the very least, there should have been very serious access control to the scene. None of them are wearing any type of protective gear except rubber gloves, and there is nothing more than standard crime scene access control. Contrast this with a scene later in the same episode where 2 characters in the lab are wearing respirators when dealing with the dust and other stuff from vacuum cleaning system. If the CSI team or the police really suspected that there was a biohazard or dangerous chemical agent present at the crime scene, then their behaviour was quite cavalier under the circumstances.

Factual error: 2-20 Run Silent, Run Deep - They are suppose to be in Giants Stadium in NJ, but you can tell by the stadium configuration and color of the seats that they are in the L.A. Coliseum.

Continuity: In episode "Some Buried Bones": At the end when Reed is hugging Mac, Reed's arms go from being low across Mac's arms to around his shoulders between shots.