Logan's Run - S1-E1
Revealing mistake: Francis runs into a long corridor that is meant to extend way back into the distance. However his reflection and shadow hitting it prove that it is just a painting of a corridor stuck to the wall. (00:11:00)
Logan's Run - S1-E1
Revealing mistake: Logan and Jessica commandeer a hover car that floats above the ground, but in shots of the car moving, wheels of the prop hover car are seen.
Logan's Run - S1-E1
Revealing mistake: The pyrotechnic charge to planted in the wall to show the impact/explosion of the Sandman's pistol is visible before the Sandman fires at Logan and Jessica.