Deliberate "mistake": Every time the investigators deal with IP-addresses, the addresses on display are impossible. Each of the four parts of an IP-address has to be between 0 and 255. As they do have to use IP-addresses some time, they could use addresses starting with 10. Those would be real addresses although not used as an official IP-address. This isn't the same as phone numbers using 555 - any IP address over 255 just wouldn't work. It would be like mentioning a phone number which uses the symbol for pi.

Continuity: In episode "The good, the Bad and the Dominatrix" When Sara takes the photos of Lady Heather's neck bruising you see 2 distinct ligature marks. When Brass serves her with the search warrant you can see only the remnants of one ligature mark then when she is in Brass' office later she again has 2 ligature marks.

Continuity: Series 7 - Part 1: When Sara and Warrick are at the table discussing the case, Sara's box containing her veggie sandwich changes position depending on whether the camera is looking at her or Warrick. (It moves from directly in front of Sara, and then several inches to her right toward the edge of the table).

Continuity: In episode 8-1 Dead Doll: When Warick finds the zip-tie in the trunk it is not looped, when he holds it up for Grissom it is looped. He would not have looped it himself.

Other: In episode "The Good, the Bad and the Dominatrix" When the son goes to the bank he tells the manager that there was a million dollars in that account last week, there was 843,508.00 taken out leaving a balance of 31,053.86. That only adds up to 874,561.86. Not a million dollars. He doesn't say close to a million dollars He says there was a million dollars in that account.

Continuity: In Episode 8-08, "You Kill Me," when Archie takes the first kilo of cocaine out of the case, he takes the bottom-most left-most kilo. When he takes out the second kilo, he removes the same package with the empty space being two to the left of the one he would have removed.

Plot hole: Lizzie had the car towed to icebox canyon. When you see her watching the car being lowered onto Sara, there is no tow truck there, there is no sound of any machinery lowering the car, and when the shot pans back there is nothing there that would have helped her move the car. She is not strong enough to hold up a car, put an unconscious person under it while holding it up, and then lower it without some kind of winch.

Continuity: In the Season 8 episode "Goodbye & Good Luck," near the beginning, Sara and Warrick bump into each other and Warrick drops his medicine. During their conversation, Warrick squeezes Sara's shoulder and then drops his hand. The shot instantly cuts to a view from behind Sara and Warrick's hand is back on her shoulder with no time (or reason) for him to have put it back.

Continuity: When Holly is first in Grissom's office and says that she feels light headed, Grissom offers her a chocolate-covered grasshopper and takes one for himself. Holly asks, "Is there a grasshopper in there?" and Grissom's right hand is near his waist. When the shot changes, Grissom merely smiles and eats the grasshopper, but his hand started off much closer to his chin without there being an opportunity for him to move it.

Factual error: There are some majors problems with the "jumper's" crime scene. The girlfriend bashes the boyfriend on the back of his head. He bleeds out all over the balcony (she cleans up the blood with towels) but the body leaves absolutely no blood behind on the carpet (It's white\off white so blood would stain badly). She drags his body across the carpet and carpet fibers get stuck in his watchband by the adjustment knob. Dragging a body across the carpet would snag fibers on the opposite side. The CSI crew experiment and conclude the boyfriend was pushed. The blow to the head killed him instantly (coroner's report): therefore, the girlfriend would have dumped the body. Dumping a dead body over a rail would provide a different trajectory than pushing a live person and would not have matched their experiments. Finally, the boyfriend is fairly muscular and heavy. The girlfriend is petite. It would be an extremely difficult task to stand a lifeless body up at the balcony rail and flip him over. (If she could have lifted him up and over the rail, she should have been able to carry him to the balcony instead of dragging him.)

Plot hole: Grissom examines the victim's body and immediately rules it a homicide because he was wearing eyeglasses. He states that suicide is a cowardly act and no coward wants to see their death and would have removed their glasses before committing suicide. What a completely unfounded, and unscientific, statement. Suicide being an act of cowardice is his opinion and not a scientific fact and they don't work off opinions: they always state how they work off the evidence.

Revealing: While the morgue's examiner opens Johnson's right eye with his fingers, the "corpse's" eyelid twitches repeatedly.

Audio problem: In the scene where Gil is talking to the drug dealer in the desert, he refers to him as a 'dumb punk'. But this has been dubbed over as what he actually called the dealer was a 'dumb prick' which you can tell by Gil's lip movements.

Factual error: The show falls into the Hollywood myth on polygraphs. Jesse is given a polygraph test after pleading guilty to the 4 murders. He answers all questions, except the last one, honestly. The 4 traces on the polygraph show no real movement on these questions. On the final question, Jesse lies and all 4 traces spike. If polygraphs actually did that, they would be admissible in court. But the reality is, it is the opinion of a highly trained operator that decides if there is a lie. The average person could not look at a polygraph results and point out a lie. There is no huge, visible spike. The producers could have replaced the 4 traces with a red\green light: Green is an honest answer and red a lie.

Continuity: At the end, when Tina is shown the photos of Brenda they are in a pile of three. The camera cuts to a long shot and there are two in a row. Cut back to Tina and they are a pile of three again. This happens on and off throughout the scene.

Continuity: Sara takes pictures of Brenda with an UV light camera. The camera used to film the episode for broadcast is barely able to show the walls in the background as tiled. When the UV pictures of Brenda are used in the interrogation, the photos show Brenda's back up against the tile wall.

Factual error: Grissom and Catherine are looking through a microscope and discussing a microscopic specimen (heart of frozen body). In reality they would not see anything as all microscope objectives are missing on this instrument (the microscope nose-piece is totally empty.).

Deliberate "mistake": When the runner is shot in the back of the head in the SUV, the bullet has come out the front of his head. However, blood is seen on the windshield instead of a bullet hole where the bullet would have continued to go through the glass.

Revealing: At the end of the episode, Grissom pins the newspaper article about the security guard's death onto the bulletin board and the camera zooms in on it. The article is three paragraphs long, however it is the same paragraph of text repeated three times. (A DVD player with a zoom feature can confirm this.)

Continuity: When Sara and Warrick are interviewing Meg at the end of the episode, the scene cuts between a medium shot of the dynamic duo, a close up of Meg's face and a close up of her hands which remain clasped on the table. The first time we cut to Meg there are tears in her eyes, but her face is dry. The second time we cut to Meg, there is a drying tear track on her right cheek. The third time we cut back to her, the tear track is gone, but there is a tear halfway down her left cheek. This continues throughout the scene