Pay in Pain - S1-E7
Audio problem: When Mackey is interrogating Leon the camera is pointed at Mackey as he asks Leon "why are you and the other shop owners all telling the same lie?" The camera then switches over Mackey's right shoulder so we can see Leon's reaction to Mackey's question. Look closely at Mackey's mouth in this shot, you can see him mouthing the exact words that he just spoke.
Episode #3.3 - S3-E3
Audio problem: In a conversation with Colin, Zoë says "What is the point of it being able to do all this stuff if we can't see the results?" The camera then cuts away from her face, she continues "We need to find out who [name I won't embarrass myself by misspelling] is talking to." This line has been dubbed in, as it is said while the actress' face is off-screen and in a completely different tone of voice. (00:35:30)