Revealing mistake: At the end of the episode when Tuco shows up at Walter's house in the backseat of Jesse's car, he tells Walter to get in. As they drive off, the shot pans out to show the street sign across from Walter's house. The sign says Piermont, which is the real name of the street. In the show, the Whites live on Negra Arroyo Lane. (00:48:00)
Revealing mistake: Any time any character is driving a Suburban, or any other vehicle with a column mounted shift lever, the shifter is in park while they appear to be driving.
Revealing mistake: When Sookie finds Dawn dead, in the close-up of Dawn's body, you can see the actress' pulse at the base of her neck. (00:50:55)
The Equation - S1-E8
Revealing mistake: The shots of Peter and Walter entering St. Claire's are recycled shots from the pilot. You can tell because their clothes change.
Revealing mistake: When Connor and Cameron are trying to save Derek Reese from the police truck, Cameron walks on the Jeep's hood to jump onto the police truck. During her walk, we can see that it isn't Cameron but a stunt double. She doesn't look like Cameron and is a bit taller. (00:33:05)
Revealing mistake: When Nero and Gemma are talking, a woman can be seen in the background moving a paint roller up and down without actually touching anything. (00:54:45)
Revealing mistake: During the exchange between Hevy and Cutup regarding Echo's enjoyment of their dull posting, the left pauldron of Hevy's armour is positioned weirdly, clipping through his arm at the bottom. (00:01:34)
Revealing mistake: In the scene where Mitchell first visits McNair's van, Mitchell's reflection is visible in the window on the left side of the screen during the shot where he first opens the van door. The vampire lore of the show informs the viewer many, many times that vampires (such as Mitchell) and ghosts cannot be seen in reflections, pictures, or videos (their image "cannot be captured"). The reflection can be seen for roughly 20 seconds. (00:23:20)
Revealing mistake: Near the end of the episode, when Dr. Ogden and Murdoch look closely at Lukas' dead body (right before the candle scene), the "corpse" takes a deep breath.
Revealing mistake: In practically all the episodes, where we see Darken Rahl wearing a sleeveless shirt, there are visible vaccination scars on his shoulders.
Episode #3.4 - S3-E4
Revealing mistake: After DC Louise Gardiner dies, DCI Jim Keats closes her eyelids. She swallows as he moves his hand across her face.
The Darkest Hour: Part Two - S4-E2
Revealing mistake: At the very beginning of the episode, as the knights are about to send Merlin to Camelot with Lancelot, the knights walk towards the camera. As they do, there's a patch of green screen the special effects department must have forgotten to remove between Sir Elyan and Sir Percival. (00:02:10)