The Bad Beginning: Part One - S1-E1
Revealing mistake: Near the end of the episode when the Baudelaires are in bed, the camera goes outside and pans down the front of the house. Once it reaches the next set of windows below the Baudelaires' "bedroom", the camera wobbles slightly.
Revealing mistake: Just after Rey catches BB-8, she looks back at the sand worm. Suddenly, in this shot, you can see the rigging seam on its neck where it connects to the upper part of the mouth, which is not visible in other shots. Usually, the neck seam blends in or is not visible, but in this shot, you can see where the neck and top of the mouth are separate pieces in this 2D rig. (00:01:59)
Revealing mistake: When Andi walks into the library (this is not Andi's dream) it cuts to the librarian sitting at her desk and we can see the shot is flipped - note the bookcase and the librarian's buttons. (00:10:40)