Gabby's Gold - S3-E8
Revealing mistake: When Kim and Gabby swing from the bar to kick the two villains, its obvious that Gabby kicked the guy in the knees, but he falls holding his chest. Plus Kim was a good 8-12 inches from her target and he fell anyway.
Chez Mammy - S3-E15
Revealing mistake: When Cathy and Gaston return to the house to find Betty, Father Damien and Annette Curtain high from the chocolate brownies, she asks where Mrs. Brown is and she tells Cathy that she is upstairs wandering around since she is high. Cathy then tells her to come back downstairs and Mrs. Brown replies a few seconds later saying she is coming back down and flies down the stairs in the chair lift. Before Mrs. Brown comes back down, she can actually be seen sitting in the chair lift at the top of the staircase, from the moment where she tells Cathy she is upstairs to the moment where she says she is coming, waiting for the cue to come downstairs.
The Authority/The Virus - S2-E10
Revealing mistake: In "The Authority," when the Wattersons return to normal and start screaming "The brake!", Darwin's animation repeats itself in the same frame. Thanks to the slow motion the scene is going in, this error is easy to spot.
Revealing mistake: In the pilot, the exterior of a bar is shown as a scene transition. While the show takes place in Los Angeles, the bar and street intersection shown are in Providence, Rhode Island. You can see a banner with the word Providence in the shot and the street names match the intersection.
God Bless Her Rotting Soul - S8-E3
Revealing mistake: If you look at Professor Youens' left foot when he is lying on the couch you will notice a chroma key error - half his foot is almost eaten by the carpet. (00:19:15)
The Talented Mr. Kipling - S1-E2
Revealing mistake: When Luke shows Emma the picture of the hawk, you can see that the camera is fake; it does not have a real screen.
Revealing mistake: The swords Jayden and Dekker use often bend when striking each other, revealing they are rubber blades and not metal.
And the Rich People Problems - S1-E4
Revealing mistake: When Caroline's dad "calls her" when Caroline puts the phone to her left ear the phone is on the home screen, compared to the screen you should get if there was a call.
Revealing mistake: When the students see themselves in the TV, (which meant that Skidmore was watching them because Chyna had given her a hidden camera) you can see in the TV that there is actually a green screen on the screen and the video is not actually playing, it was just edited in later.
Revealing mistake: After their intimate night together, Wade goes for more, but Zoe tells him she wants breakfast first. As he crawls out from the sheets, you can see the lining of his white underwear.
Hungry Like the Wolf Dog - S3-E18
Revealing mistake: When Jillian throws the keg, you can see a rope attached to the keg pulling it after she spins.
Revealing mistake: There are numerous episodes where Mike is recording a video for Outdoor Man with his webcam, and a status bar is advancing towards the end of the video, indicating that the live recordings were added to the video stream in post production and synced up to the original performance.
Revealing mistake: When Mr. Goodman blows his nose, you can see a little pink from the makeup on his nose (to make him look sick).