Revealing mistake: In the scene where the wife comes in to the morgue to view her dead husband, who she helped to euthanize, the dead man is breathing throughout the whole scene. You can see the sheet rising and falling at his stomach. (00:22:15 - 00:24:05)
Revealing mistake: They are driving down the freeway when a shot reveals that the check engine light is on and it also looks as if the 'door open' warning light is illuminated. The latter is probably because the film crew have the rear door open for filming. (00:23:47)
Revealing mistake: The dead victim is being examined in the morgue, right as the mortician says "the kid put up a fight" the dead victim swallows as she strokes his hair and says the word "fight." (00:09:35)
Episode #9.2 - S9-E2
Revealing mistake: Rose's newborn baby, Isabel, is suspiciously large and mature.
Withdrawal - S2-E1
Revealing mistake: At 46:24, Peter and Mozzie are sat on a bench. Peter's paper has the exact same wording on back pages as well as the front page. (00:46:24)
Revealing mistake: The FBI woman picks up the phone to speak to her boss but the phone is off. (00:22:38)
Revealing mistake: When Roberta Halton knocks Rob unconscious, you can see that the blunt object barely even makes contact with his head.
Saving Face - S3-E3
Revealing mistake: After they drop the casket and Provenza says 'guess you can take it with you!', the close up of the dead girl shows her close her mouth.
The Alchemy Murder Case File 1 - S1-E6
Revealing mistake: When Kindaichi shifts the stage screen Miyuki is holding, her fingers are not gripping the sides in the new position. Unless she is keeping it up sticking the back of it to her palms like Spider-man, it is impossible. She does hold it normally in all the other shots. (00:01:55)
We Will All Be Judged by the Courage of Our Hearts - S1-E8
Revealing mistake: When Nomi is on her bike, in a wide shot, she is portrayed by a stunt woman.
Backlash of the Hunter - S1-E1
Revealing mistake: During the whole climactic duel between plane and car, despite the setting in the desertic outskirts of Vegas, aerial view show already from the beginning several tire tracks from previous takes. (01:30:00)
The Case of the Missing - S1-E1
Revealing mistake: WPC Softly leans on a model building in Rammel's office, causing it to collapse by stages. The wire that is being pulled to make the model collapse can be seen to the right of the model. (00:21:00)
Revealing mistake: In the morgue when Mike is just about to cover the first dead body, if you look closely you will see the body's eye move. (00:04:10)
Revealing mistake: While Holmes and Watson are investigating the crime scene, there is a shot of them that shows the dead man's hand. His hand is visibly shaking, revealing the actor is struggling to maintain the position of his hand.
Revealing mistake: In the close-up of Frost's hand while the doctor is stitching up his wound, you can see the delineated edges of the latex make-up patch used to simulate the injury. (00:12:30)
Episode #1.1 - S1-E1
Revealing mistake: The "game" Lily is playing on her iPad is actually a 14-second video downloaded 10/16/2020, as visible from the iOS photo gallery UI bordering the tablet. (00:12:04)
Revealing mistake: When the fire starts, you can see a massive spark from whatever starting mechanism was used. The blunt wouldn't make a spark that big.
Revealing mistake: When Jamie sits down after rappelling down the canyon wall you can see that he has climbing rope attached to his harness. It's wrapped in duct tape to look like its the rope he and Adam made of duct tape. This may just be a safety line to support his weight if he duct tape rope snaps, but the Mythbusters usually point out any backup safety systems and explain that they are there for caution and don't contribute to the test. (This was explained in the aftershow. It was a safety line required by the shows insurers).