A Bullet Runs Through It (Part 1) - S6-E7
Other mistake: "A Bullet Runs Through It," part 1; while Catherine is in the lab reviewing the audio tape of the police call to dispatch, the dispatcher claims that the first call she received was at 6:34. First, her lips do not match what she is saying and then when they show the screen with the audio playing, the screen reads "first call 5:43."