Revealing mistake: As the gang drives up to the space-ship diner, cars are whizzing by in the background. When they are driving to the base there's also a clip of a fire truck going down the highway in the distance.
Revealing mistake: When Brad wears the sunglasses and holds the pole, you can easily see the string that holding it up.
Single Point of Failure - S1-E2
Revealing mistake: Walter accesses code on the sick girl's laptop to trace the source of the virus - aside from the fact that the code comes straight up a fraction of a second after his hands even touch the keyboard, the code displayed in the black window is for a set of traffic lights, with lines like "Walk/Dont_Walk" and "Green_Arrow/Yellow_Slow." (00:08:10)
Unreal City - S2-E1
Revealing mistake: When Chandler and the others make it to the building where the bodies are being burned, the actor playing a corpse flips his hand over to hold onto the conveyor belt as he goes over the edge. (00:16:05)
Revealing mistake: When Chloe and Jack are in the car she is looking at the computer on her lap. The gear shift in the car is a automatic and it shows it being in park as they are driving. (01:20:10 - 01:20:55)
Revealing mistake: When Iris is sitting in bed recording the message for Barry, she is holding her iPhone so that the start button is on the left side, but the "video record" button appears on the right. Additionally, her right hand covers the speaker area of the phone fully, including the front facing camera. It is impossible for Iris to be recording the video live and reveals that the video footage was recorded ahead of time. The illusion that the video is being recorded by Iris live is further ruined by the fact that the room lighting is turned off in the scene, but the recording is well lit. (00:02:55)
Relics of the Old Republic - S2-E3
Revealing mistake: There are two shots of Sabine while she's repairing the Phantom and talking to Kanan on her comlink where her neck is missing.