Never Again... Never Again - S1-E7
Revealing mistake: The day for night filming is particularly obvious at the entrance fence, and when the two mysterious guys try are kneeling outside of the house wondering how many people they have to deal with, with just 4 shots; you can see perfectly white clouds. It's even worse later in the episode when the Ferrari stops in front of the doctor's house; you can literally see the sun shine reflected by the car and the wet asphalt throughout the whole scene. (00:26:15)