Never Trust an Honest Man - S1-E14
Revealing mistake: In one of the early panoramic shots of the train heading toward the mountains, there are two jet contrails in the sky at the upper right of the screen. (00:07:00)
Never Trust an Honest Man - S1-E14
Revealing mistake: At the end, when Christine's father enters the kitchen, the unmistakable outline of a papered-over electrical outlet is showing on the wall behind him. (00:45:10)