Visible crew/equipment: When Hotchner, Callahan, JJ, and Rossi surround Frank's car on the private property, just after Callahan sees the leg on the seat, when she opens the passenger side door the reflection of the standing male cameraman/crew member is visible on the surface of the car, between the windows.
Revealing mistake: When the unsub is in the house with the mother and her toddler, one of the shots of the toddler is flipped, before he starts crying.
Magnum Opus - S8-E13
Continuity mistake: In the scene where you first watch the killer drain a victim's blood, the upper part of the glass jar is coated with blood, but when he puts it in the fridge this part of the jar is clear. On the other hand some of the jars in the fridge are still fully coated with blood, which shouldn't be as the blood had the time to gather at the bottom. (00:07:15)
Other mistake: The age of the deceased Raymond Leu (35) shown in a death certificate doesn't match up based on year of birth (1948) and year of death (2014).
Other mistake: In the opening scene, the UnSub is wearing breathing apparatus, however his smoke hood is under his face mask. Wearing the hood under the mask would make it impossible to get a face seal, and as such would let smoke into the mask.
Character mistake: Unsub calls his victim Marcy, her real name, as opposed to Rose who he believes she is.
Factual error: They were talking about serial killers having kids on the plane at the end. Hotel said, Manson had 10 or 11 children. Charles Manson only had 3 sons.
Other mistake: Evergreen State University in Olympia Washington should be The Evergreen State College (they aren't a university). The transcript for Evergreen (assuming they meant the real college) is also wrong in every way: -They said the guy Ivan was expelled, but the transcript lists a B.A. awarded in June of 1968? - Evergreen has always used a narrative evaluation so there are no grades. There shouldn't be numbers or averages. -There are no majors - you get a B.A. or a B.S. -They don't have classic course names like "Philosophy 101" or "History." -The school was founded in 1967 - he couldn't have taken those classes that are listed from 1964 - 1967. (00:18:50)
Revealing mistake: When Morgan is typing "Cult named Forever People," his phone is typing it automatically. His fingers aren't even tapping the correct letters. (00:19:45)
Character mistake: Close to the end of the episode, Dr. Reid says to the psychotic guy that was holding hostages, "M-theory cannot be proved." It should be "proven, " not "proved." Dr. Reid is supposed to be a genius, so he should be the last one to make such a mistake.
Other mistake: There is a mugshot of a 35 year old suspect on Garcia's computer. According to what she is saying, the suspect's mother died 10 years ago. A photo shows her with the suspect and he looks exactly the same age as he does now. (00:40:00)
Character mistake: When Blake is telling Spencer to keep his eyes on her after being shot she calls him Ethan twice. (00:02:29)
Suggested correction: This is very poignant and deliberate moments in the dialogue. Blake is feeling distraught since Reid pushed Blake out of the way and took the bullet instead of her. Blake calls Reid by her dead son's name, "Ethan," when she tries to keep him alert and shouts, "Ethan, Ethan!" Later in the episode, when Blake takes Reid back to his apartment, she explains that watching Reid when he was hurt touched a nerve. Reid then asks Blake, "Who's Ethan?" and Blake tells Reid all about her son "Ethan" who died when he was 9 years old. Blake then tells Reid that "Ethan" would have been a lot like him. Note, on the jet return flight, Blake texted Hotch her resignation from the BAU, and at the very end she leaves her badge with Reid.
Character mistake: Dr. Reid calls Penelope "Kristy" on a phone call.
Suggested correction: He calls her "Garcia."
About Face - S3-E6
Continuity mistake: This episode is a flash back to when Agent Gideon joins the team, but agent Prentiss is already a member. She didn't join until season 2 (when agent Gideon was already an established character).
Factual error: Violet is seen wearing Hood style flip-flops where there is a denim like covering just beyond the sandal straps, but this scene takes place in 2001, 12 years before those shoes were available.
Suggested correction: It actually looks like she is wearing wide leg jeans which cover her feet and shoes giving that illusion.